－There are so many current styles, which one should I choose?

－________．

A．It's your opinion

B．I don't mind

C．It's all up to you

D．That’ s your decision

________ reducing pullution, man should pay more attention to conserving energy．

A．As well as

B．As long as

C．As far as

D．as soon as

I was too busy at that time, ________ I would have given you a hand．

A．even though

B．so

C．otherwise

D．nevertheless

The question occurred to me ________ we were to get the machine needed．

A．that

B．what

C．why

D．where

－Was her concert a great success?

－Sure．________ such a good chance, how could she let it slip away?

A．Having given

B．Giving

C．Having been given

D．Being given

________ is now no doubt ________ global warming is a security threat to us all．

A．It; that

B．There; that

C．There; whether

D．It; whether

Being examined twice a year, whether it is a car or a bus or a truck, is the rule that every driver ________ obey in this city．

A．shall

B．can

C．ought to

D．need

The doctors say that good diet, exercise and fresh air, all of which ________ the health and long life．

A．lead to

B．refer to

C．stick to

D．contribute to

On farewell party the foreign teacher gratefully ________ all the helps from all the school．

A．thank

B．acknowledge

C．claim

D．declare

On that cold day, only ________ handful of people were at the station, where I made ________ acquaintance of Mr．Smith．

A．a; an

B．a; the

C．the; a

D．the; the