Question

【题目】—Must I come back home before 8 pm today, Mum?
—No, youYou can come back before 9 pm.
A.needn't
B.mustn't
C.can't
D.shouldn't

Answer 1

【答案】A
【解析】句意：---妈妈，我必须在今天晚上8点以前回家吗？---不，你不必，你可以9点前回来。A、needn't不必；B、mustn't一定不要，表示禁止；C、can't不能；D、shouldn't不应该。根据后一句You can come back before 9 pm可知答案为A。