—May I speak to Lin Tao?
—Sorry, he is not in. He ______ to Changsha.
A. has been B. has gone C. went
We want to be ______ because, as students, we should learn to help other people.
| A．performers | B．interviewers | C．patients | D．volunteers |
I am too busy to listen to her ______ talking. She has talked for about two hours.
| A．hopeless | B．endless | C．harmless | D．careless |
－Look, your sister is playing the piano over there.
－She ______ be my sister. She has gone to America.
| A．mustn’t | B．can’t | C．shouldn’t | D．may not |
It is polite ______ you to give seats to the elderly.
| A．with | B．for | C．of | D．to |
－Why are there a lot of dead fish in the river?
－Because they were ______ by the polluted water.
| A．caught | B．poisoned | C．burned | D．protected |