51.Now we may be able to say ______ between music and noise or just sound.

a. what is the difference b. the difference is what

c. what the difference is c. that what the difference

52.Contraryto ______ I had expected, he lost for a second time.

a. that b. what c. which d. who

53.Professor Smith was so punctual ______, he always arrived to class just as the bell rang.

a. that the day he died b. until the day he died

c. that until the day he diedd. until the day when he died

54.______ he came to England to study, he didn’t know how to cook.

a. When b. sincec. Untild. Unless

55.Although Mr smith is one of those teachers who appear to be friendly, ______ he is very hard to deal with.

a. but b. so c. so that d. yet

56.______ a baby kangaroo is four months old does it begin to live outside its mother’s pouch.

a. Until b. Not until c. After d. Only until

57.The earliest kind of desk was a box that had a sloping lid _______ there was storage space for writing materials.

a. under that b. under which c. whichd. that

58.I won’t lend any money to Joe because I am afraid ______ he will forget to pay it back.

a. if b. whether c. that d. of

59.______ human beings depend to a great extent on forests, every effort must be made to preserve trees and wildlife.

a. If b. Unless c. Until d. Since

60.______ he was caught cheating on the exam, Oliver had been considered to be an honest boy.

a. When b. After c. Although d. Before

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提出的很好，我很喜欢，就是不知道答的是否正确。

xiexie!

51.Now we may be able to say ___a___ between music and noise or just sound.

a. what is the difference b. the difference is what

c. what the difference is c. that what the difference

52.Contraryto ___b___ I had expected, he lost for a second time.

a. that b. what c. which d. who

53.Professor Smith was so punctual ____d__, he always arrived to class just as the bell rang.

a. that the day he died b. until the day he died

c. that until the day he diedd. until the day when he died

54.___c___ he came to England to study, he didn’t know how to cook.

a. When b. sincec. Untild. Unless

55.Although Mr smith is one of those teachers who appear to be friendly, ____a__ he is very hard to deal with.

a. but b. so c. so that d. yet

56.___d___ a baby kangaroo is four months old does it begin to live outside its mother’s pouch.

a. Until b. Not until c. After d. Only until

57.The earliest kind of desk was a box that had a sloping lid __b_____ there was storage space for writing materials.

a. under that b. under which c. whichd. that

58.I won’t lend any money to Joe because I am afraid __c____ he will forget to pay it back.

a. if b. whether c. that d. of

59.___d___ human beings depend to a great extent on forests, every effort must be made to preserve trees and wildlife.

a. If b. Unless c. Until d. Since

60.____c__ he was caught cheating on the exam, Oliver had been considered to be an honest boy.

a. When b. After c. Although d. Before

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