22、Small sailboats can easily torn over in the water            they are not managed carefully.

A．though

B．before

C．until

D．if

21、His movie won several awards at the film festival,            was beyond his wildest dream.

A．which

B．that

C．where

D．it

20、The Town Hall              in the 1800’s was the most distinguished building at that time.

A．to be completed

B．having been completed

C．completed

D．being completed

19、There is nothing more I can try            you to stay, so I wish you good luch.

A．being persuaded

B．persuading

C．to be persuaded

D．to persuade

18、After a knock at the door, the child heard his mother’s voice           him.

A．calling

B．called

C．being called

D．to call

17、Pop music is such an important part of society                it has even influenced our language.

A．as

B．that

C．which

D．where

15、― How was the televised debate last night?

― Super! Rarely            so much media attention.

A．a debate attracted

B．did a debate attract.

C．a debate did attract

D．attracted a debate

14、With the help of high technology, more and more new substances            in the past years.

A．discovered

B．have discovered

C．had been discovered

D．have been discovered

13、― Guess what! I have got A for my term paper.

― Great! You          read widely and put a lot of work into it.

A．must

B．should

C．must have

D．should have