-Will you please stay here for the party?-Sorry ,I____.I'll have to go to an important meeting.A mustn't B may not C needn't D can't

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-Will you please stay here for the party?-Sorry ,I____.I'll have to go to an important meeting.A mustn't B may not C needn't D can't

-Will you please stay here for the party?-Sorry ,I____.I'll have to go to an important meeting.A mustn't B may not C needn't D can't
-Will you please stay here for the party?-Sorry ,I____.I'll have to go to an important meeting.A mustn't B may not C needn't D can't

-Will you please stay here for the party?-Sorry ,I____.I'll have to go to an important meeting.A mustn't B may not C needn't D can't
选A是指想做但是必须要去做别的:对不起,我不能.我要去一个重要的会议.
B,指可能不行,不符合句意
C.指不需要做
D.是指不能做,去不了的意思

BC肯定不选啊,因为后面有HAVE TO ,所以要选MUSTN'T,你这么跟你老师说她肯定算你对了,其实CAN'T 在生活中也是可以用的。

have to 表示“必须”啊,所以前面用“mustn't”