Sam _________ stamps since he was eleven years old, and now he has hundreds of them.

[　　]

A. collected

B. was collecting

C. has been collecting

--　　　　 have you been skating?

--For two hours.

[　　]

A．How many

D．How far

C．How often

D．How long

My sister is interested in 　　　　 stamps.

[　　]

A．collect

B．to collect

C. collecting

D．collected

He was born 　　　　 a rainy night.

[　　]

Mr Brown isn't here. He 　　　　 to the post office.

[　　]

A．went to

B．has gone to

C. has been to

D．will go to

--Jim had no time 　　　　 in the town.

[　　]

A．how go shopping

B．do shopping

C．to go shop

D．to do shopping

--How long have you been here?

--I've been here　　　　.

[　　]

A．since two years

B．since two years ago

C．for two years ago

D．for two year

--　　　　have you been reading?

--I've been reading for two hours?

[　　]

A．How soon

B．How often

C．How long

D．How many

I think she should _______ her a letter.

[　　]

The teacher asks you _______ the classroom.

[　　]