Question

【题目】—Should I wear a suit for the concert tonight?
—No , you ________. It is not as serious as the one we went to last week .
A.mustn't
B.needn't
C.can't
D.wouldn't

Answer 1

【答案】B
【解析】句意：—今天晚上我应该穿套装去参加音乐会？—不，你不必，这一个不像我们上周去的那个那样严肃。mustn't“禁止，不要”；needn't“不必，没有必要”；can't“不能”；wouldn't“不愿意”。根据句意可知，这个音乐会不是那么正式，所以没有必要穿套装。故应选B。