—Let's go singing tonight? —Sorry, I ___
题型:选择题
问题:
—Let's go singing tonight?
—Sorry, I _____. I have to look after my sister. [ ]
A. mustn't
B. may not
C. can't
D. needn't
—Let's go singing tonight?
—Sorry, I _____. I have to look after my sister. [ ]
A. mustn't
B. may not
C. can't
D. needn't