—Is that your baseball?—__________.That’s her baseball.
---That black T-shirt with Yao Ming’s picture on it ____ belong to David. He likes him very much. ---No, it ____ be his. He hates black colour.
We need ____at the hotel for ____because of the heavy snow.
---I think English is ____unimportant subject. ---I don’t think so. It is ____useful tool when we talk with foreigners.
— My family and I will go back to the USA tomorrow. — ____________
-- Must I do my homework right away? -- No, you _____. You_____ do it later. A. can’t, must B needn’t, may C. may not, must D. mustn’t, can