As we all know, numbers ________ in e-mail English to stand for words.

A. used to

B. are used

C. are used to

D. use to

It ________ me about two months to finish writing my new book in 2004.

A. spend

B. spent

C. take

D. took

The TV is pretty loud. Could you turn it ________ a little?

A. up

B. down

C. off

D. away

She agreed ________ earlier, but she was still a little late.

A. coming

B. to come

C. has come

D. on coming

He never used to swim in the river,________ he?

A. wouldn't

B. doesn't

C. was

D. did

His father is sitting at the desk, ________ a story-book.

A. looking

B. seeing

C. reading

D. watching

Those ________ smoke should go to the next room.

A. whom

B. who

C. which

D. whether

Everyone must make a contribution ________ protecting our environment.

A. about

B. with

C. to

D. for

She first met Peter four years ago, he ________ at a computer store at that time.

A. has worked

B. had worked

C. was working

D. had been working

The problem is ________ difficult that I can't work it out.

A. so

B. such

C. so a

D. such a