21、─ Just imagine Mike finished the tough job only in 2 hours.  

─ He _____ it all by himself. I dare say even 3 people can’t do it in one day.  

A. can’t do                B. couldn’t do           C. can’t have done          D. couldn’t have done  

20、I haven’t visited all the places of interest in and around Guilin, so I’d like to stay ____ week.  

A. one                       B. other                    C. another                   D. the other  

19、We won’t go to her birthday party since _____.  

A. we weren’t invited                                   B. we haven’t invited  

C. not invited                                                 D. not being invited  

18、As it turned out to be a small house party, we ______ so formally.  

A. needn't dress up                                  B. shouldn't dress up  

C. were not necessary to dress up             D. needn't have dressed up  

17、 Before the war broke out, many people _______ in safe places possessions they couldn't take with them.  

A. threw away         B. gave away       C. put away      D. carried away  

16、Everyone fails now and then. It's how you react that makes a _____ in life.  

A. development       B. difference        C. point          D. progress  

15、 I think it advisable that he _____ for Tokyo soon.  

A. may leave         B. leave          C. will leave         D. leaves  

14、Alice, stand beside Harry so that I can see which of you is ________.  

A. the taller           B. taller              C. tall          D. the tallest  

13、____ excited my friend, David greatly that he was chosen as chairman of the organization.  

A. What                B. That                C. It              D. As  

12、A wise man once said, “When one door shuts, _______ opens in life.”  

A. the other            B. other               C. either         D. another