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

52. Contrary to ______ 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 died d. until the day when he died

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

a. When b. since c. Until d. 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. which d. 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

61. Not long after Galileo’s time, Newton invented another kind of telescope ______ mirrors instead of lenses.

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