---How long has the train been away?
---Sorry. I don’t know. By the time I got here, the train ________.
| A．has left | B．was leaving | C．has been away | D．had left |
—Must I take much medicine every day?
—No, you ________.
| A．must | B．mustn’t | C．needn’t | D．can’t |
—Animals are our friends. We should protect them.
—________.
| A．I agree with you. | B．Sure, go ahead. |
| C．It must fun. | D．How exciting! |
Tom Maria are from Cuba?
| A．Both; and | B．Both; or | C．Either; and | D．Either; or |
I don’t think the robots will humans
| A．instead of | B．helps | C．take the place of | D．instead |
— ?
—Nothing serious, but a bit tired.
| A．Is that all | B．Is there anything else? |
| C．What’s this | D．What’s the matter with you |