--- Will you please answer the door? It _______ be your sister.
---Sorry, I ________. I'm feeding the rabbit.
| A．must；mustn’t | B．will；can’t |
| C．may；can’t | D．must；needn’t |
---. Can I help you ? --- ___.
| A．How much are they? | B．Yes, please. Do you sell bags? |
| C．How about this one? | D．Here you are. |
--- Where ___my trousers ? --- ___ on the bed .
| A．are , It’s | B．is , It’s | C．are , They’re | D．is , They’re |
I don’t like science _______ it’s difficult.
| A．but | B．so | C．because | D．and |
There ___ some rice in the bowl.
| A．are | B．is | C．have | D．has |
Please ___me ___ 33786632@qq.com.
| A．call; at | B．call; for | C．e-mail; at | D．e-mail; for |