________ you can ________ our school concert.
| A．Maybe, in | B．Maybe, be in |
| C．May be, in | D．May be, be in |
I feel tired, but I don’t want to stop _______.
| A．work | B．to work | C．works | D．working |
I _______ 2 hours finishing my homework last weekend.
| A．took | B．cost | C．paid | D．spent |
----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 |
--- What did the policeman say to you, Liu Ying?
--- He told me ______ my purse in the bicycle basket. It’s too dangerous.
| A．not put | B．to put |
| C．don’t put | D．not to put |
I _______ in London, but now I live in New Yorker.
| A．used to living | B．am used to living |
| C．used to live | D．am used to live |