20．It was the hurricane ____was called Katrina _____destroyed the city of New Orleans.

A．what; that　　 　　　 B．what; which　 　　　 C．which; that　 　　　 D．that; which

19．We like ______ on Sundays when the whole family get together talking and laughing.

A．this　　　　　　　　　　　　 B．that　　　　　 　　 C．it　　　　　 D．those

18．Lei Feng ____ a lot of things for others in his life, people thanked him for what he _____.

A．did; had done　　　　　 　　　　　　 　　 B．had done; had done　

C．had done; did　 　　　　　　　　 　　 D．did; did

17．　　　 　I admit that there are problems, I don’t agree that they can’t be solved．

A．If 　　　　　　　　 　　　 B．As 　 　　　　　　　　　　 C．While 　　　 　　　　　　　 D．Since

16．While in London I found my broken English difficult ________.

　　　 A．understanding　　　　　　　　　　 　 B．to be understood

C．to understand　　　　　　　　　 　　 D．understood

14．- Excuse me, but I want to use your computer to type a report

- You ______ have my computer if you take care of it.

　 A．shall　　　　 　　　 B．must　　 　　　　　 　　　 C．need　　　 　　　　 D．should 15．---- Did you go to the open-air concert?

---- No. We ____. but we spent too much time shopping.

A．could have gone　　　　　　　　 　　　 B．must have gone

C．can’t have gone　　　　　　　 　 　　　 D．shouldn’t have gone