-May we leave the classroom now? -No, you ______. You ______ to leave until the bell rings.
If more trees ______ planted, our city will be more beautiful. A. were B. are C. will be
That man ______ be my English teacher. He has gone to Canada. A. needn’t B. mustn’t C. can’t
- ______ does your mother watch the Talk Show?- Once a week. A. How long B. How often C. How soon
The students are helping the old man clean ______ house now. A. her B. him C. his
It’s cold outside. You’d better ______ your coat. A. put on B. take off C. put away