________ in the regulations that you should not tell other people the password of your e-mail account．

1. A.
   What is required
2. B.
   What requires
3. C.
   It is required
4. D.
   It requires

      in the regulations that you should not tell other people the password of your e-mail account.

A. It requires     B. It is required     C. What requires     D. What is required

      in the regulations that you should not tell other people the password of your e-mail account.

A. It requires     B. It is required     C. What requires     D. What is required

_______ in the regulations 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?

      in the regulations 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