Most of the children enjoy ________ computer games.

[　　]

--What did you do last night?

--I did my homework and________ TV.

[　　]

The doctor often tells him________ more exercise.

[　　]

--Can you sing the song in English?

--No, I________.

[　　]

--Whose bike is it.?

--It's ________.

[　　]

Jack, look at your dirty shoes. You'd better ________ them right now.

[　　]

My mum met his old friend on________ way home yesterday.

[　　]

In ________ spare time, she plays the violin.

[　　]

The boy is looking after ________ sheep on the hill.

[　　]

Some buildings along the street ________ to keep the city tidy.

[　　]

A. pulled down

B. was pulled down

C. were pulled down

D. were pulling down