---Who is making much noise?
---It ____ be Timmy. He is sleeping now.
| A．can’t | B．may not |
| C．mustn’t | D．couldn’t |
相关试题
These days students in some schools ______ not to use mobile phones.
| A．ask | B．asked | C．are asked | D．were asked |
—Look! There so many people in the park.
— Nobody likes to stay at home ______ Sunday morning. 
| A．in | B．on | C．at | D．to |
—Mr. King, we have finished planting all the trees.
— _________
| A．Never mind. | B．That’s too bad. | C．Don’t mention it. | D．Well done! |
—I often have hamburgers for lunch.
— You’d better. It’s bad for you ______ too much junk food.
| A．eat | B．to eat | C．eating | D．ate |
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