---There is somebody knocking at the door. Who________ it be?
---I’m not sure. It ________ be a postman.
| A．may; must | B．will; can | C．can; may | D．may; will |
He goes to school by bus, but he walks after school.
| A．to home | B．home | C．his home. | D．the home |
How can we fight _____ pollution?
| A．for | B．with | C．against | D．To |
“Dad,_____ you help me with my Maths homework?”said Judy.
| A．must | B．can | C．should | D．may |
My mum worked a whole day and was very tired.She lay in bed and soon _____asleep.
| A．fall | B．feel | C．fell | D．felt |
People in China enjoy _____ during the winter holiday.
| A．ski | B．to ski | C．skiing | D．skies |