Remember to ________ the lights before you leave the lab.

A. turn on

B. turn off

C. turn up

D. turn down

Don't ________ the radio. The baby is sleeping.

A. turn off

B. turn on

C. turn over

D. turn down

It's important ________ the piano well.

A. of him to play

B. for him to play

C. of him playing

D. for him playing

After the discussion, the students asked the teacher ________ next.

A. which to do

B. what to do

C. how to do

All my classmates want ________ something for the 2008 Olympics.

A. do

B. doing

C. to do

D. done

There are some dangerous fishes in this river, and I've warned Jack ________ here.

A. not to swim

B. to not swim

C. swim not to

D. to swim not

Don't make me ________ this or that. I'm too busy!

A. to do

B. do

C. doing

D. done

It's good habit ________ breakfast every day.

A. had

B. have

C. has

D. to have

My grandfather wants ________ around the world because he enjoys ________ new places.

A. travelling; seeing

B. to travel; to see

C. to travel; seeing

D. travelling; to see

Mother asks me ________ computer games before finishing my homework.

A. not play

B. to play

C. not to play

D. to not play