It’s too difficult．Why ________ the teacher for help?

A．not ask

B．not to ask

C．don’t ask

D．not asking

There are some books on the floor．Will you please ________ for me?

A．to pick up it

B．to pick them up

C．pick up it

D．pick them up

She was ________ happy ________ say a word when she heard the news．

A．so; that

B．so; as

C．too; to

D．to; too

The nurse is ________ busy ________ she has no time to look after her family．

A．so; that

B．so; as

C．such; that

D．such; as

The mountain was ________ steep(陡峭的)________ few people in our city reached the top．

A．so; as

B．so; that

C．as; as

D．too; to

－________ are the Olympic Games held?

－Every four years．

A．How soon

B．How often

C．How long

D．How far

－________ does he take this medicine?

－Twice a day．

A．How long

B．How often

C．How soon

D．How much

We are always ready ________ others．

A．to helping

B．to help

C．help

D．helping

The teacher often warns the boy ________ swim ________ in the sea because it’s dangerous．

A．don’t; alone

B．not; by himself

C．not to; by himself

D．not to; lonely

Excuse me．Would you please tell me ________ buy a digital camera?

A．what to

B．where to

C．what I can

D．where can I