Mr Green doesn't climb down the chimney until the children are ________ .

A. asleep

B. sleep

C. go to bed

D. asleeping

Colours can change our moods and make us ________ happy or sad, energetic or sleepy.

A. to feel

B. feeling

C. felt

D. feel

We have worked for three hours. Now let's stop ________ a rest.

A. had

B. have

C. to have

D. having

?Is your father a doctor?

?Yes, he is. He ________ in Town Hospital.

A. has worked

B. had worked

C. works

D. worked

?Will you watch the World Cup match this year？

?No, but I ________ several World Cup matches since I was a small child.

A. had seen

B. see

C. was seeing

D. have seen

Oh, this is really a big shop. Do you know when it ________ ?

A. built

B. was built

C. has built

D. has been built

?What should we do first if we want to develop our village？

?A lot of new roads ________, I think.

A. must build

B. have to build

C. must be built

D. have built

?Must I wait for you here now？

?No, you ________. You may be back in half an hour.

A. don't have to

B. mustn't

C. can't

D. shouldn't

?________ your sister ________ in Green China for a long time？

?Yes. She joined it five years ago.

A. Has; been

B. Have; been

C. Has; joined

D. Have; joined

The river smells terrible. People must ________ dirty things into it.

A. be stopped to throw

B. be stopped from throwing

C. stop to throw

D. stop from throwing