21.??We haven’t been able to find out the ___ of the rumour. A. source B. cause C. origin D. reason ...

16.??There are few electronic appliances ___ to raise fears regarding future employment opportunities than robots. A. likely B. more likely C. most likely D. much likely ...

11.??The sounds of music grow ___ in the distance. A. faint B. fade C. wane D. ebb ...

6.??Tom ___ to review his lessons before exams. A. went out his way B. went out of his way C. went of his way D. went out of a way ...

1.??___ man can now create radioactive elements, there is nothing he can do to reduce their radioactivity. A. As B. Whether C. While D. Now that ...

21.??There ______ in this room. A. are too much furniture B. is too many furnitures C. are too much furnitures D. is too much furniture ...

16.??My father was watching me or something, drawing back the curtain so little_____I catch him. A. in order that B. only if C. so that D. lest ...

9.??The surroundings of his house ______ clean now. A. is B. are C. was D. were ...

4.??Not unitl (A)my mother told me the sad news (B)last night did I knew (C)that our neighbor Dr. Li was killed(D) in a car accident.（选择错误一项） A. Not unitl B. the sad news C. did I knew D. was killed ...

24.??I don’t think it any use ___ him. A. reasoning with B. for reasoning C. reason with D. to be reasoing with ...