---Who is making much noise?
---It ____ be Timmy. He is sleeping now.
| A．can’t | B．may not | C．mustn’t | D．couldn’t |
I don’t know_______________.
| A．where can we buy the tickets |
| B．how much it costs to fly to Hainan |
| C．what is he waiting for |
| D．why was he late for school this morning |
The child doesn’t need any help. He is old enough to ______ himself.
| A．put on | B．wear | C．dress | D．have on |
Green representsand nature. When you feel weak, you can wear green.
| A．sadness | B．purity |
| C．joy | D．energy |
-Mr Wu, must we bring some water to the park?
---No, you_____. Drinking water is offered there.
| A．shouldn’t | B．mustn’t |
| C．needn’t | D．can’t |
-- I’m going to the Science Museum tomorrow. -- -________
| A．Enjoy yourself! | B．Come on! |
| C．Good luck! | D．Congratulations! |