Question

【题目】—It's nearly 6:00 p.m. Will you have supper here?
—Sorry, I ____. I have many things to do.
A.mustn't
B.can't
C.needn't
D.won't

Answer 1

【答案】B
【解析】句意：将近傍晚六点钟了，你在这里吃晚饭好吗？—对不起，我不能，我有很多事情要做。A. mustn't禁止，B. can't 不能；C. needn't 不必；D. won't不会。will在这里表示一种委婉的语气，不表将来时态，对于别人发出的邀请，如果不同意，常说Sorry, I can't. 然后加上理由，故选B。