— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.
— Oh, it ____ my younger sister. She was in my room at that moment.
| A．must have been | B．should have been | C．could have been | D．may have been |
—________ is the richest man in this town?
—I think Mr Kim is the richest man.
| A．Whom do you think | B．Who you think | C．Do you think who | D．Who do you think |
Many sailors think that a thick fog is their ________ enemy.
| A．dead | B．dying | C．death | D．deadly |
I made a suggestion ________ he ________ to Australia for further education.
| A．that; goes | B．that; go | C．which; will go | D．what; will go |
—Will you ________ our house while we are out on holiday?
—Well, that ought to be no problem.
| A．keep an eye on | B．keep an eye out | C．have an eye for | D．turn a blind eye to |
The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.
| A．those | B．that | C．it | D．this |