20、Can you imagine what problem may ________ when human beings are cloned?

A．raise               B．cause             C．arise              D．lead

19、She is too fat, but she can’t ________ sweet．

A．remove          B．resist          C．reject          D．object

18、It is widely accepted that animals learn to do things because their certain acts lead to _______．

A．rewards           B．prize           C．awards           D．results

17、They have no idea at all ________．

A．where he has gone                              B．where did he go

C．which place has he gone                             D．where has he gone

16、The September 11 attack has been _____ by the entire international community．

A．condemned           B．scolded             C．criticized           D．blamed

15、The news has _______ all over the country _______ the spaceship succeeded in returning to the earth．

A．inspired; which      B．inspiring；that      C．inspired ; that          D．spread; which

14、Your composition is _________to your brother’s．

A．the same           B．identical            C．different           D．equal

13、He is a cutler（刀具商）_____, a man who sells knives and sharp tools．

A．in conclusion          B．in general        C．what’s more       D．that is to say

12、One of the men held the view ____ the book said was right．

A．what  that         B．what          C．that          D．that  what

11、Seeing your picture, I couldn’t resist _____ the days _____ we spent together．

A．to think of; when                               B．to think of; which 

C．thinking of; which                              D．thinking of; when