15．Lots of waste has been dumped into the river，which has led to________.

A．lots of fish having been killed

B．kill lots of fish

C．lots of fish being killed

D．lots of fish to kill

14．There was a________look on his face when he met with the________problem.

A．confusing；confusing　 　　　　 B．confused；confused

C．confusing；confused　 　　　　　 D．confused；confusing

13．You’d better go there by train.The train ticket is________the airplane ticket.

A．as cheap three times as　 　　　　 B．as three times cheap as

C．three times cheaper than　 　　　 D．cheaper three times than

12．(2009年山东德州模拟)-Shall I give you a ride as you live so far away?

-Thank you，________.

A．it couldn’t be better　 　　　　 B．of course you can

C．if you like　 　　　　　　　　　　　　 D．it’s up to you

11．At times the balance in nature is________，resulting in a number of possibly unforeseen effects.

A．confused　 　　　　　　　　　　　　　 B．puzzled

C．disturbed　 　　　　　　　　　　　　　 D．troubled

10．If I ruled the world，I would________the world________everything that is bad.

A．get rid of；by　 　　　　　　　　　 B．be rid of；by

C．rid；of　 　　　　　　　　　　　　　　 D．get rid；of

9．________your help，how could I have passed the difficult interview!

A．But for　 　　　　　　　　　　　　　　 B．Thanks to

C．Owing to　 　　　　　　　　　　　　　 D．As to

8．China has successfully sent up the Shenzhou Ⅶ spacecraft into space________with sophisticated devices of science and technology.

A．to be equipped　 　　　　　　　　　 B．equipped

C．equipping　 　　　　　　　　　　　　　 D．having been equipped

7．The population of Africa is________so rapidly as to cause concern of the whole world.

A．expanding　 　　　　　　　　　　　　 B．stretching

C．extending　 　　　　　　　　　　　　　 D．spreading