31. How much did you spend ______ the computer ?
A. on B. in C. on buying D . to buy
答案: A 翻译: 解释:
32. Tigers hunt for food ______ most of the time while lions like to hurt in groups .
A. lonely B. alone C. one D . together
答案: B 翻译: 解释:
33. Either the children or their father _____ gone swimming . I'm not sure .
A. have B. has C. are D . is
答案: B 翻译: 解释:
34. The news _____ for my brother .
A. are B. is C. were D . be
答案: B 翻译: 解释:
35. Larry is so selfish that he never helps others , ____________ he ?
A. is B. isn't C. does D . doesn't
答案: B 翻译: 解释: