Everyone is busy working．You can’t stay here ________ you keep quiet．

A．if

B．when

C．once

D．unless

This is the only one of the books ________ we need．

A．that

B．which

C．what

D．all

Things are ________ on the moon ________ on the earth．

A．as heavy; as

B．not so light; as

C．heavier; than

D．much lighter; than

The police ________ the man to see if he had a gun．

A．searched

B．looked for

C．found out

D．searched for

Many satellites have been sent ________ into space．

A．for

B．out

C．off

D．up

The fire was getting stronger and stronger and it seemed to ________．

A．lose control

B．be under control

C．be out of control

D．be controlled

There are too many people in the house．There isn’t enough ________ for us all．

A．rooms

B．space

C．floor

D．ground

Let’s do listening ________ first．Listen carefully, please．

A．practicing

B．practice

C．example

D．work

There are ________ people ________ the street．

A．too much; on

B．too much; in

C．too many; in

D．too many; at

Could you tell me what you have ________ mind?I think I can give you some advice ________ it．

A．at; about

B．in; on

C．in; of

D．on; on