It is not polite ____ in public places.
| A．smokes | B．to smoke | C．smoked | D．smoking |
______ great scientist Qian Xuesen is!
| A．How | B．How a |
| C．What | D．What a |
I don’t know when he ______. When he ______, I will let you know.
| A．will arrive, will arrive |
| B．arrives, arrives |
| C．will arrive, arrives |
| D．arrives, will arrive |
------Whose shirt is this?
------ It _______ be Li Lei’s. It is too big for him.
| A．could | B．must |
| C．can’t | D．might |
Stop smoking, _______ you will get better soon.
| A．and | B．or |
| C．but | D．after |
—How long have you _______________ the motorbike?
—For about two weeks.
| A．bought | B．had |
| C．borrowed | D．lent |