Question

-May I play football in the street?

-No, you ________．

1. A.
   may not
2. B.
   mustn't
3. C.
   needn't
4. D.
   don't

Answer 1

B
这是一道关于“情态动词”的试题．重点是测试may表示请求许可时，否定回答一般用mustn't或can't．依此规则，即可先排除A、C、D，剩下正确答案B．