1,Let's go dancing tonight.--Sorry,I_____.I have to go to th

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1,Let's go dancing tonight.--Sorry,I_____.I have to go to the cinema.
A,can't B,mustn't C,may not
2,David talked with a friend of ___ on the internet for a long time yeaterday.
A,he B,his C,him
请说明选择理由

1.A
mustn't 一定不要,不许,表“命令,禁止”
例：You mustn't smoke.
may not 不可以
can't 不能
B
a friend of his= one of his friends

1,Let's go dancing tonight.--Sorry,I_____.I have to go to th Let's go dancing tonight.Sorry,I ___.I have to go to a meeti ------Let's go dancing tonight .------Sorry,I___.I have to g 选最佳答案：1.---Let's go dancing tonight -----Sorry Let's go to see a movie tonight.改反意疑问 Let’s go to the cinema tonight.I _____ for you at the gate 请 Let's go to the movies tonight.换成----go to the movies tonght 例:we're( going to go)dancing tonight. I am sorry,"------".I have to go to the doctor "------". i have to go to the children's palace to learn th piano. A:Let's go to play football B:Sorry ,I'm ( ) a math problem. Shall we go to a movie tonight ___.Let's go.