The island country is _______ its clean waters and clear skies, which are free _____ pollution of any kind.
| A．well known to; of | B．famous for; for |
| C．well-known for; of | D． famous as; from |
In warm weather fruit and meat ________ long.
| A．don’t keep | B．can’t be kept |
| C．are not kept | D．aren’t keeping |
―Was the doctor there when you arrived?
―Yes, but he ______ out a moment later.
| A．had gone | B．has gone |
| C．went | D．is going |
―Why? Where is the key to the sound lab?
―Dear me! You _______ it in the taxi！
| A．have never left | B．never left |
| C．haven’t left | D．didn’t leave |
―________ for Beijing?
―Yes. And I’ll come back in three months.
| A．Have you left | B．Are you leaving |
| C．Do you leave | D．Did you leave |
―What were you doing when I called you yesterday afternoon?
―I ________ my homework and I was starting to take a bath.
| A．had just finished | B．was finished |
| C．have already finished | D．was going to finish |