1、May I talk with you ? 2、All of them can answer my questions. 3、Need I go to your office tomorrow ? 4、It means we shouldn't eat or drink in the cinema. 5、Can you make kites? No, I can't. 6、Wang Bing is ill. He may not go to school tomorrow. 7、Excuse me, can I have some envelopes? 8、You mustn't walk on the grass. 9、You worked for a day. You must be tired. 10、You must finish your homework before lunch. 11、You may ask Tom how to make a model ship. 12、You've got a cold. You must stay in bed and have a good rest.