That man ______ be my English teacher. He has gone to Canada. A. needn’t B. mustn’t C. can’t
There is a policeman _____ the bus. He is watching the traffic.
It’s good _____ old people to cross the road.
—Lily, here are your pens. Please _____ . —OK, Mom.
— _____ do you _____ English? —I like it very much.
—How many _____ are there in your class? —About 63.