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7．My father worked day and night．Otherwise，there ________ no one to support the family．（　�。�

A．

would be

B．

must be

C．

would have been

D．

must have been

6．Laughter is the greatest medicine that helps people（48）whocan not work out become fit．
First of all，laughing out loud helps improve your general fitness．This is because laughter strengthens the heart and the lungs．（49）Besides，a good laugh can relax your muscles．（50）Whenyou laugh，the muscles become active．After you laugh，these muscles start to relax．So（51）itis very useful for people with breathing problems to laugh．Third，laughter makes us feel（52）thesense of happiness．Experts say that the positive feelings produced by laughter not only make us happy（53）butalso help us reduce pain．
The next time you feel upset（54）ordisappointed，do not worry．Enjoying a funny comedy or reading some jokes will drive away your negative feelings and make you feel（55）much better．

5．If you _____ the chat room ten minutes ago，you _____ what we were talking about!（　　）

	A．	joined，would know		B．	had joined，would know
	C．	joined，would have known		D．	had joined，would have known

4．One reason _____ there are so many French words in English is that the French ruled England for quite a number of years．（　�。�

A．

because

B．

which

C．

why

D．

what

3．Ladies and gentlemen，please fasten your seat belts．The plane _______．（　　）

A．

is taking off

B．

takes off

C．

has taken

D．

took off

2．Mikael was set free very soon because of a lack of________ that he was guilty．（　�。�

A．

doubt

B．

conclusion

C．

evidence

D．

belief

1．The students started their exciting journey in balloons_________ by jets of hot gas．（　�。�

A．

drove

B．

to drive

C．

driven

D．

driving

20．We still remember the day_________ we spent in the old house．（　�。�

A．

what

B．

on which

C．

when

D．

which

19．One morning I was sitting at my desk when a policeman__________ at the door．（　�。�

A．

knocked

B．

was knocking

C．

had knocked

D．

knocks

18．______ into use in April 2000，the hotline was meant for residents reporting water and heating supply breakdowns．（　�。�

A．

Put

B．

Putting

C．

To put

D．

Being put