________ is known to all that good friends ________ happiness and value to one's life．

A．It; add

B．As; add

C．It; add up to

D．As; add to

－Stay a bit longer; it's been such ________ fun having you with us．

－Thanks, anyway．I've got ________ early start tomorrow morning．

A．/, the

B．a, an

C．/, an

D．the, an

－Do you know the reason ________ pilots turn off the plane's lights before taking off?

－The practice is for the passengers to adjust to the dark ________ an emergency．

A．why; for fear that

B．for which; in case of

C．how; for fear of

D．that; in case

－Sir, you are fined for speeding．Please sign here．

－Fined? Speeding?________

A．Are you all right?

B．I don't think I am．

C．You can't be serious．

D．It doesn't matter．

－These girls are not doing fine at school, are they?

－________．

A．I guess not so

B．I don't guess

C．I don't guess so

D．I guess not

－Can I tell my best friend about it?

－No．I don't want anyone else to know．You ________ let it out．

A．mustn't

B．won't

C．don't have to

D．don't need to

________ we sleep together or apart is one of the biggest cultural differences, and only in western societies ________ the feeling that babies should sleep apart from their parents．

A．No matter; it is

B．Whether; is it

C．No matter; there is

D．Whether; is there

－Where did you meet him?

－It was in the hotel ________ I was staying．

A．that

B．how

C．where

D．which

He felt ________ when he found a stranger ________ about at the gate of the police station．

A．puzzling; hung

B．puzzled; hung

C．puzzling; hanging

D．puzzled; hanging

－What's your favorite music, by the way?

－I really ________ progressive jazz．

A．go to

B．take for

C．addict to

D．go for