25．Once more I am in Shanghai, ______I have not been for years.

A．that

B．where

C．which

D．when

24．They found there was ______ to weigh such an elephant.

A．big enough nothing

B．nothing enough big

C．enough nothing big

D．nothing big enough

23．You are doing it in a wrong way. It ______ this way.

A．used to do

B．is used to doing

C．used to be done

D．is used to do

22． ______you apologize for what you've just said ______it is all over between us.

A．Either; or

B．Not only; but also

C．Whether; or

D．Neither; nor

21．I saw the man ______down and the driver ______away.

A．knocking; driven

B．knock; driving

C．knocked; driving

D．knock; drive

20．The lift has just ______. We have to walk up to the top floor.

A．taken down

B．broken down

C．come down

D．turned down

19．______ about the history of that part because there is not enough written information.

A．People know nothing

B．Much is known

C．People know a lot

D．Little is known

18．To their great joy, the day they looked forward to ______at last.

A．coming

B．had come

C．came

D．to come