用括号内所给单词的适当形式填空。（5分）
1. He shows great interest in _________ (chat) with his classmates by QQ.
2. I prefer _________ (music) who play many different kinds of songs.
3. If I had a million dollars, I’d give it to _________ (medicine) research.
4. John _________ (drop) his wallet on the ground while walking on the road.
5. Please speak ___________ (clear), or others can’t catch what you mean.

Our teacher is very kind to us. So we regard her ________our best friend.  

A．on

B．to

C．as

D．at

It is our ________ to look after our parents when they get old.

A．duty

B．habit

C．problem

D．decision

After a serious illness, he finally _______ how important his health is.   

A．meant

B．realized

C．added

D．impressed

Would you please drive more ________, David? The train is leaving soon.  

A．slowly

B．carefully

C．easily

D．quickly

Mrs. Wang always asks us to ________ conversations in the English classes.

A．make up

B．turn up

C．end up

D．look up

If I am free, I’d like to spend _________ holiday in the countryside.

A．a two-days

B．a two days

C．two- days

D．a two-day

– You seem to know much about the city.
– That’s true. I _______ it four times in the last three years.

A．visited

B．am visiting

C．have visited

D．will visit

– It’s difficult for the village children to cross the river to get to school.
– We think a bridge ________ over the river.

A．was built

B．should be built

C．has been built

D．is being built

The yellow coat ________belong to Linda because nobody likes yellow except her.    

A．can’t

B．may

C．must

D．needn’t