Scientists are convinced ________ the positive effect of laughter ________ physical and mental health

A．of; at

B．by; in

C．of; on

D．on; that

－What made Celia so happy?

－________ a prize in the recent competition

A．As she won

B．Won

C．Winning

D．Because of winning

Mum ________ to us,“Be quite !Your little sister is sleeping．”

A．whispered

B．shouted

C．explained

D．replied

Two middle-aged passengers fell into the sea．________, neither of them could swim

A．In fact

B．Luckily

C．Unfortunately

D．Naturally

She observed a man ________ on the opposite side of the way, and recognized it was Charlie

A．walked

B．walking

C．to walk

D．walks

The development of science and technology must benefit people ________ harm them

A．rather than

B．other than

C．more than

D．better than

Mr．Hilton's new house is almost ________ the one he used to live in

A．the twice size of

B．as twice big as

C．bigger twice than

D．twice the size of

－How about seeing the new movie at the theatre tonight?

－________, but I've got to go over my notes for tomorrow?

A．That's right

B．Sounds great

C．I Can't

D．No

The film reminded him ________ he had seen in the countryside．

A．what

B．that

C．of that

D．of what

Is it in this car ________ was bought last week ________ you went to Beijing yesterday．

A．which; that

B．that; which

C．which; which

D．that; in which