Between the two periods of classes is a break,_____we can have a short rest.
| A．then | B．where | C．when | D．Which |
Here is the tower, ______ top you can have a good view of the whole city.
| A．from whose | B．from its | C．over whose | D．whose |
People in industrial countries take in as they actually need every day.
| A．twice as much protein | B．protein as much twice |
| C．twice protein as much | D．protein as twice as much |
To meet the challenge, the young people preferred heavier work to do in their spare time.
| A．to have given | B．to be giving | C．having give | D．to be given |
--- What has happened to Alice ?
--- I don’t know. She her job.
| A．can have lost | B．may have lost | C．should have lost | D．need have lost |
Just putting away the dishes, .
| A．the telephone rang | B．someone knocked at the door |
| C．Mary heard the phone rang | D．the door was opened |