Most of the students felt rather disappointed at the English party. They say that it ______ better o

题干

Most of the students felt rather disappointed at the English party. They say that it ______ better organized.

A：had bee

B：had to be

C：must have bee

D：could have bee

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下表是对部分犯罪少年过往行为的调查数据，它告诉我们（）

行为	有打架行为	有旷课行为	有赌博行为	经常光顾网吧	看过不良书籍、影像
比例	57.9%	49.8%	44.3%	44.9%	31.9%

①不良行为必然发展为违法行为 ②不良行为任其发展，可能导致违法行为

③犯罪少年都有打架和旷课行为 ④青少年要避免不良行为，预防违法犯罪