in the regulation is that you should not tell other people the password of your e-mail account.
A. What is required
B. What requires
C. It is required
D. It requires
网友回答
(答案→)A. What is required
B. What requires
C. It is required
D. It requires
解析:考查主语从句的应用。句意:规定里面要求的是你们不能将邮箱密码告诉别人。regulation 后面的is 是这句话的谓语,所以前面是句子的是主语,主语从句中缺少主语用what连接主语从句,C项没有用被动语态,CD项用的是形式主语it,那么句中多了一个is,选A.