－Shall we go hiking this Sunday? －Sorry, I _______. I’ll have to take a piano lesson.
| A．may not | B．can’t |
| C．needn’t | D．mustn’t |
There’s a lot to do. We can’t __________ to waste any time.
| A．wait | B．afford | C．want | D．have |
—I’m going to Hainan on vacation next week.
-- __.
| A．Have a good time | B．Not at all |
| C．Thank you | D．I have no idea |
—Jack，could you tell me __?
--Sure.In the post office on Green Road.
| A．where you bought the stamps |
| B．where did you buy the stamps |
| C．when you bought the stamps |
| D．when did you buy the stamps |
We have to__ourselves when we are away from home.
| A．look at | B．look for | C．look up | D．look after |
—Dad，can I go to the movies tonight?
--Sure，but you__come back home before 9 o’clock.
| A．can | B．must | C．may | D．might |