问题
Could you go to the bookshop with me I want to buy The Grass House by Cao Wenxuan.–Sorry, I . I’ve promised Mum to go home right after school.
A:can’t
B:couldn't
C:needn't
D:mustn't;
B:couldn't
C:needn't
D:mustn't;
正确答案是：
同类题型
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