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1. ¡ª How long has this bookshop been in business?

¡ª¡¡¡¡ ____________ 1982.¡¡ ( 94 )

A. After¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. In¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. From¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. Since

2. Mother was worried because little Alice was ill, especially _____________ Father was away in France. ( 94 )

¡¡A. as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. during¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. if

3. If we work with a strong will, we can overcome any difficulty, ____________ great it is.¡¡( 95 )

¡¡A. what¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. how¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. however¡¡¡¡¡¡¡¡¡¡¡¡D. whatever

4. After the war, a new school building was put up _____________ there had once been a theatre. ( 97 )

¡¡A. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. where¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. which¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. when

5. ¡ª I am going to the post office.

¡ª¡¡¡¡ you¡¯re there, can you get me some stamps? ( 99 )

A. As¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. While¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. Because¡¡¡¡¡¡¡¡¡¡¡¡D. If

6. You should make it a rule to leave things _____________ you can find them again. ( 99 )

¡¡A. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. where¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. then¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. there

7. ____________ you¡¯ve got the chance, you might as well make full use of it. ( 99 )

¡¡A. Now that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. After¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. Although¡¡¡¡¡¡¡¡¡¡ D. As soon as

8. We¡¯ll have to finish the job, _____________.¡¡( 99 )

¡¡A. long it takes however¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. it takes however long

¡¡C. long however it takes¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. however long it takes

9. Someone called me up in the middle of the night, but they hung up ____________ I could answer the phone. ( 00 )

¡¡A. as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. before

10. The WTO cannot live up to its name _____________ it does not include a country that is home to one fifth of mankind. ( 00 )

¡¡A. as long as¡¡¡¡¡¡¡¡¡¡¡¡ B. while¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. if¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. even though

11. The men will have to wait all day ____________ the doctor works faster.¡¡( 01´º¼¾ )

¡¡A. if¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. whether¡¡¡¡¡¡¡¡¡¡¡¡D. that

12. ¡ª Did you remember to give Mary the money you owed her?

¡¡ ¡ª Yes, I gave it to her ____________ I saw her.¡¡( 01´º¼¾ )

¡¡A. while¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. the moment¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. suddenly¡¡¡¡¡¡¡¡¡¡ D. once

13. Americans eat _____________ vegetables per person today as they did in 1910. (02ÉϺ£´º¼¾ )

¡¡A. more than twice¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. as twice as many

¡¡C. twice as many as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. more than twice as many

14. ¡ª How far apart do they live?

¡ª¡¡¡¡ _____________ I know, they live in the same neighbourhood.¡¡( 03ÉϺ£ )

A. As long as¡¡¡¡¡¡¡¡¡¡¡¡ B. As well as¡¡¡¡¡¡¡¡¡¡C. As far as¡¡¡¡¡¡¡¡¡¡ D. As often as

15. A good storyteller must be able to hold his listeners¡¯ curiosity ____________ he reaches the end of the story.¡¡( 03ÉϺ£ )

¡¡A. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. until

16. Generally speaking, ____________ according to the directions, the drug has no side effect.¡¡( 03ÉϺ£ )

¡¡A. when taking¡¡¡¡¡¡¡¡¡¡B. when taken¡¡¡¡¡¡¡¡C. when to take¡¡¡¡¡¡D. when to be taken

17. ¡ª Dad, I¡¯ve finished my assignment.

¡ª¡¡¡¡ Good, and ____________ you play or watch TV, you mustn¡¯t disturb me.¡¡( 03ÉϺ£ )

A. whenever¡¡¡¡¡¡¡¡¡¡¡¡ B. whether¡¡¡¡¡¡¡¡¡¡¡¡ C. whatever¡¡¡¡¡¡¡¡¡¡ D. no matter

18. ¡ª Was his father very strict with him when he was at school?

¡¡ ¡ª Yes. He has never praised him ____________ he became one of the top students in his grade.¡¡(03 ±±¾©´º¼¾)

¡¡A. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. when

19. He made a mistake, but then he corrected the situation ____________ it got worse.¡¡(03 ±±¾© )

¡¡A. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. as

20. _____________ I know the money is safe, I shall not worry about it.  (03 ±±¾© )

¡¡A. Even though¡¡¡¡¡¡¡¡¡¡B. Unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. While¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. As long as

21. Scientists say it may be five or six years _________ it is possible to test this medicine on human patients. ( 04 ¸£½¨ )
 A. since ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. when

22. You should try to get a good night¡¯s sleep __________¡¡much work you have to do . ( 04 ºþ±± )
 A. however¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. no matter¡¡¡¡¡¡¡¡¡¡ C. although¡¡¡¡¡¡¡¡¡¡¡¡D. whatever

23. It was evening ________ we reached the little town of Winchester .
 A. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. before

24. _____ modeling business is by no means easy to get into, the good model will always be in demand.¡¡( 04 Õã½­ )
 A. While¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. Since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. As¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. If

25. We were swimming in the lake _______ suddenly the storm started. ( 04 ±±¾©´º¼¾ )

¡¡A. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. while¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. before

26. _______ I can see, there is only one possible way to keep away from the danger. ( 04 ±±¾©´º¼¾ )

¡¡A. As long as¡¡¡¡¡¡¡¡¡¡¡¡ B. As far as ¡¡¡¡¡¡¡¡¡¡C. Just as ¡¡¡¡¡¡¡¡¡¡¡¡D. Even if

27. We were told that we should follow the main road¡¡________¡¡we reached the central railway station . ( 04 ÁÉÄþ )
 A. whenever¡¡¡¡¡¡¡¡¡¡¡¡ B. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. while¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. wherever

28. _____ you call me to say you' re not coming, I'll see you at the theatre. ( 04 ËÄ´¨ )

¡¡A. Though¡¡¡¡¡¡¡¡ B. Whether¡¡¡¡¡¡¡¡¡¡¡¡ C. Until¡¡¡¡¡¡¡¡  D. Unless

29. You can eat food free in my restaurant ________ you like.¡¡( 04 ÖØÇì )

A. whenever¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. wherever¡¡¡¡¡¡¡¡¡¡ C. whatever¡¡¡¡¡¡¡¡¡¡ D. however

30. _____________ I accept that he is not perfect, I do actually like the person. ( 04 ½­ËÕ )
A. While¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. Since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. Before¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. Unless

31. Several weeks had gone by ______I realized the painting, was missing.¡¡( 04 )

¡¡ A. as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. when

32. Jasmine was holidaying with her family in a wildlife park _____ she was bitten on the leg by al lion. ( 04 ÉϺ£ )
 A. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. while¡¡¡¡¡¡¡¡¡¡ ¡¡ C. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡  D. once

33. ________, I have to put it away and focus my attention on study this week. ( 04ÉϺ£´º¼¾ )

¡¡¡¡A. However the story is amusing¡¡¡¡¡¡¡¡¡¡¡¡ B No matter amusing the story is

¡¡¡¡C. However amusing the story is¡¡¡¡¡¡¡¡¡¡¡¡ D. No matter how the story is amusing

34. It is almost five years  ¡¡¡¡¡¡¡¡ we saw each other last time.

A. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. when

35. What a table ! I¡¯ve never seen such a thing before .It is ¡¡¡¡¡¡it is long. ( 05 ºþ±± )

A. half not as wide as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. wide not as half as

C. not half as wide as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. as wide as not half

36. Simon thought his computer was broken ¡¡¡¡¡¡ his little brother pointed out that he had forgotten to turn it on. ( 05 ±±¾©´º¼¾ )

A. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. after¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. because

37. I¡¯d like to arrive 20 minutes early _______ I can have time for a cup of tea. ( 05 ±±¾© )

A. as soon as¡¡¡¡¡¡¡¡¡¡¡¡ B. as a result¡¡¡¡¡¡¡¡¡¡C. in case¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. so that

38. It wasn¡¯t until nearly a month later ¡¡¡¡¡¡  I received the manager¡¯s reply. ( 05ºÓÄÏ¡¢ºÓ±± )

¡¡¡¡A. since ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. when ¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. as ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. that

39. Unlike watching TV, reading is a highly active process (¹ý³Ì)________ it requires attention as well as memory and imagination. £¨ 05 ½­ËÕ £©

A. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. but¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. for

40. The old tower must be saved, _____________ the cost. ( 05 Õã½­ )

¡¡A. however¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. whatever¡¡¡¡¡¡¡¡¡¡ C. whichever¡¡¡¡¡¡¡¡ D. wherever

41. You must keep on working in the evening ______ you are sure you can finish the task in time. ( 05 °²»Õ )

A. as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. if¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. unless

42. That was really a splendid evening. It' s years _______ I enjoyed myself so much. ( 05 °²»Õ )

A. when¡¡¡¡¡¡¡¡¡¡ B. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. since

43. John is the tallest boy in the class, ___________ according to himself. ( 05 °²»Õ )

A. five foot eight as tall as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. as tall as five foot eight

C. as five foot eight tall as¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. as tall five foot eight as

44. ¡ªDid Jack come back early last night?

¡¡¡¡¡¡ ¡ªYes. It was not yet eight o¡¯clock ¡¡¡¡¡¡  he arrived home. ( 05 ¸£½¨ )

¡¡¡¡A. before¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. until

45. Allow children the space to voice their opinions, __________ they are different from your¡¡¡¡ own. ( 05 ºþÄÏ )

¡¡A. until¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. even if¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. unless ¡¡¡¡¡¡¡¡¡¡¡¡ D. as though¡¡ ¡¡¡¡

46. The more I think about him, the more reasons I find for loving him ___ I did. ( 05 ºþÄÏ )

¡¡A. as much as¡¡ ¡¡¡¡¡¡B. as long as¡¡¡¡¡¡¡¡ C. as soon as ¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. as far as

47.¡¡¡¡  you¡¯ve tried it. you can¡¯t imagine how pleasant it is. £¨06±±¾©£©

A. Unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. Because¡¡¡¡¡¡¡¡¡¡¡¡ C. Although¡¡¡¡¡¡¡¡¡¡ D. When

48. --- How long do you think it will be _________ China sends a manned spaceship to the moon?

¡¡ --- Perhaps two or three years.¡¡£¨06¸£½¨£©

A. when¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡¡¡B. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. before

49. Jenny was very sad over the loss of the photos she had shot at Canada, ¡¡¡¡¡¡¡¡  this was a memory she especially treasured.¡¡£¨06¹ã¶«£©

¡¡A. as¡¡¡¡¡¡¡¡¡¡¡¡  B. if¡¡¡¡¡¡¡¡¡¡  C. when¡¡¡¡¡¡¡¡  D. where

50. "You can't have this football back ¡¡¡¡¡¡¡¡¡¡  you promise not to kick it at my cat again," the old man said firmly.  £¨06¹ã¶«£©

¡¡A. because¡¡¡¡¡¡¡¡ B. since¡¡¡¡¡¡¡¡  C. when¡¡¡¡¡¡¡¡¡¡ D. until

51. I had just stepped out of the bathroom and was busily drying myself with a towel ____ I heard the steps.¡¡£¨ 06ºþÄÏ £©

A. while¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡¡¡¡¡ B. when¡¡¡¡¡¡¡¡ C. since¡¡¡¡¡¡¡¡¡¡  D. after

52. _________ environmental damage is done, it takes many years for the ecosystem (Éú̬ϵͳ) to recover. £¨ 06½­ËÕ £©

A. Even if¡¡¡¡¡¡¡¡  B. If only¡¡¡¡¡¡¡¡C. While¡¡¡¡¡¡¡¡¡¡  D. Once

53. He was about halfway through his meal ¡¡¡¡¡¡¡¡  a familiar voice came to his ears. £¨ 06ÁÉÄþ £©

A. why ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. where¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. when¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. while

54.¡¡¡¡¡¡¡¡ he has limited technical knowledge, the old worker has a lot of experience. £¨ 06È«¹úI £©

A. Since¡¡¡¡¡¡¡¡¡¡ B. Unless¡¡¡¡¡¡¡¡C. As¡¡¡¡¡¡¡¡¡¡  ¡¡¡¡D. Although

55. We¡¯re just trying to teach a point ____ both sides will sit down together and talk. £¨ 06 ɽ¶«£©

A. where¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. when¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. which

56. How can you expect to learn anything ____ you never listen? £¨ 06ɽ¶« £©

A. in case¡¡¡¡¡¡¡¡¡¡ ¡¡ B. even if¡¡¡¡¡¡¡¡ ¡¡ C. unless¡¡¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡ D. when

57. His plan was such a good one _________we all agreed to accept it. £¨ 06 ÉÂÎ÷£©

A. so¡¡ ¡¡¡¡¡¡¡¡¡¡  B. and¡¡¡¡ ¡¡¡¡¡¡¡¡C. that¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. as

58. This is a very interesting book. I¡¯ll buy it, __________. £¨ 06 ÉÂÎ÷ £©

A. how much may it cost¡¡¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡B. no matter how it may cost

C. however much it may cost¡¡¡¡¡¡ ¡¡¡¡D. how may it cost

59. My parents were quarrelling about me ____ I could not quite tell why. £¨ 06ÉϺ£ £©

A. since¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. though¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. if¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡ D. until

60. --- Mom, what did your doctor say?
¡¡  --- He advised me to live¡¡¡¡the air is fresher.¡¡ £¨ 06ËÄ´¨ £©
¡¡ A. in where¡¡¡¡¡¡¡¡ ¡¡¡¡¡¡ B. in which¡¡¡¡ ¡¡  C. the place where¡¡¡¡ D. where

61. --- Why didn¡¯t you tell him about the meeting?
¡¡  --- He rushed out of the room¡¡¡¡I could say a word.¡¡£¨ 06ËÄ´¨ £©
¡¡ A. before¡¡¡¡¡¡¡¡¡¡ B. until¡¡¡¡¡¡¡¡¡¡ C. when¡¡¡¡¡¡¡¡¡¡ ¡¡D. after

62. The cost of living in Glasgow is among the lowest in Britain, ¡¡¡¡¡¡ the quality of life is probably one of the highest.¡¡£¨ 06Ìì½ò £©

A. since¡¡ ¡¡¡¡¡¡¡¡B. when¡¡¡¡¡¡¡¡¡¡C. as ¡¡¡¡¡¡¡¡¡¡¡¡¡¡D. while

63. If you are traveling ¡¡¡¡¡¡ the customs are really foreign to your own, please do as the Romans do.¡¡£¨ 06Ìì½ò £©

A. in which  ¡¡¡¡¡¡B. what¡¡¡¡¡¡¡¡¡¡¡¡ C. when¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡  D. where

64. In time of serious accidents£¬_________¡¡we know some basic things about first aid, we can save lives.¡¡£¨ 06ÖØÇì £©
A. whether¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡B. until¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡C. if¡¡¡¡¡¡¡¡¡¡ ¡¡ ¡¡  D. unless

65. __________ most of the earth¡¯s surface is covered by water, fresh water is very rare and precious.¡¡£¨ 06ÉϺ£´º¼¾ £©

A. As¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. Once ¡¡¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡C. If ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. Although

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