21、——What’s up, Mike? You look pale．

——Oh, I’m not feeling well in the stomach．I _______so much fried chicken just now．

A．shouldn’t eat                                B．mustn’t have eaten

C．shouldn’t have eaten                         D．mustn’t eat

20、This is a very special flower and it can _______a strong sweet perfume at night．

A．given in        B．give up         C．give out       D．give over

19、Many new workers _______ trained and in two months they will _______ to build a new railway．

A．are; be sending                          B．are being; be sent

C．are; send                                 D．will be; be to send

18、_______ was known to all, perseverance is a kind of quality and that’s ______ it takes to do anything well．

A．As; which                    B．As; what

C．It; which                                D．It; what

17、In many ways China’s rapid growth has been seen as a（n） _______ to improve the cooperation with other countries．

A．motivation          B．attempt

C．conception                                      D．realization

16、——We are leaving for America next Friday．

——So why not come to spend _______days with us?

A．these all last few                          B．these last few all

C．all these last few                            D．all last these few

15、——Do you think I could borrow your dictionary?

—— _________ ．

A．Yes, you may borrow            B．Yes, you could

C．Yes, go on                                  D．Yes, help yourself

14、_____ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world．

A．Being separated                                  B．Having separated

C．Having been separated                           D．To be separated

13、The written record of our conversation doesn’t ______what was actually said．There are a lot of mistakes．

A．correspond with                            B．relate to

C．look into                                        D．compare with