Did the mountains___________  far below? A. lie   B. lay   C. laid   D. lain 49

A. lie   B. lay   C. laid   D. lain

  A. get off   B. get through   C. get away   D. overcome

A. that Americans walked   B. did Americans walk 

C. when did Americans walk   D. when Americans walked

51. People say that prevention is better than cure.

 In the passive voice:

A. That prevention is said is better than cure 

B. Prevention is better that cure is said by people 

C. It was said that prevention is better than cure 

D. Prevention is said to be better than cure…

  Sure. By then I ___________ my exam.

A. will finish   B. finished   C. will have finished   D. have finish

53. He had to explain the lesson very clearly ___________

A. in order that his students can understand 

B. so that his students to understand it

C. in order to his students to understand it 

D. for his students in order to understand it