28、I spent the morning trying to　　   the documents I needed.

A．round up                 B．round off                C．round out                D．round on

27、He drew the picture quite  　　 the others.

A．different from         B．different with          C．differently from　   D．differently with

26、Only in this way            to make improvements in the operating system.

A．you can hope         B．you did hope         C．can you hope　              D．did you hope

25、The school has only been open for six months, so it’s hard to _______ its success.

A．weigh                     B．measure                  C．evaluate                  D．estimate

24、The meat you bought last week_____ terrible. It         bad.

A．smells, must go                             B．smells, must have gone 

C．is smelt, must go                           D．is smelt, must have gone

23、E－mail, as well as telephones,　　 an important part in daily communication.

A．is playing　             B．have played           C．are playing　　      D．play

22、It is said in Australia there is more land than the government knows ______.

A．it what to do with                                       B．what to do it with

C．what to do with it                                       D．to do what with it

21、It _____ long before we ______ the result of the experiment.

A．will not be; will know                         B．is; will know

C．will not be; know                            D．is; know

20、---How are you getting along with Mary?

---Well, after that quarrel, I tried to avoid her presence, as I felt she was becoming too _______ me.

A．similar to                B．known to                C．popular with            D．familiar with

19、There is hardly an environment on earth _______some species of animal or other have not adapted successfully.

A．to which                 B．in which                 C．for which               D．on which