It ________ that space is limitless．

A．believes

B．was generally believed

C．believed

D．is generally believed

We ________ smoking in the office．

A．are not permitted

B．are not allowed

C．don't permit

D．are not allowed to

On his way home, he found a wallet ________ on the ground．

A．lie

B．lying

C．lay

D．laying

I'll help you, ________ I don't sleep for a night．

A．though

B．although

C．even if

D．as if

The reason we are so late is ________．

A．because of the car breaking down

B．due to the car breaking down

C．because the car broke down

D．that the car broke down

I was about to go out ________ the bell rang．

A．while

B．as

C．when

D．after

________, I didn't pass the examination．

A．To be honest

B．To be honestly

C．Be honestly

D．Be honest

－What about having a drink?

－________．

A．Good idea

B．Help yourself

C．Go ahead, please

D．Me, too

Someone is ringing the doorbell．Go and see ________．

A．who is he

B．who he is

C．who is it

D．who it is

________ made the school proud was ________ more than 90％ of the students had been admitted to key universities．

A．What; because

B．What; that

C．That; what

D．That; because