----Look at the boy running on the playground. Is it David?
---- It ______ be him. I saw him go to the teachers’ office just now.
| A．mustn’t | B．can’t | C．may not | D．needn’t |
I think this piece of music is worth_______.
| A．listening | B．to be listened to |
| C．listen to | D．listening to |
If you have difficulty something，wearing red it easier for you to take action．
| A．do；makes | B．doing；making |
| C．with；make | D．doing；makes |
The radio says that the basketball final will be covered .
| A．alive | B．lively | C．living | D．live |
He never ______learning English. That was why he was successful at last.
| A．gave in | B．gave out | C．gave up | D．gave away |
My mother has had the clothes _______already．
| A．was washed | B．was washing |
| C．to wash | D．washed |