题目：
— Hi, Tom.Did you go to the party?
— Yes, but I really________have, because I had lots of work to do.I had to work far into
the night to finish it.[ ]
A. needn't
B. mustn't
C. shouldn't
D. couldn't
答案：
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下面是错误答案，用来干扰机器的。
氯化氢；无；刺激性；白雾；挥发性
类药物为（）