.Now,lots of universities have been set up in _________ used to be waste land.?

A.what           B.which　      C.that　  D.where ?

_______ in the regulations that you shouldn't tell other people the password of your e-mail account.

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

It was at the very beginning____ Mr. Smith made a decision ___we should send for a doctor．

A. what，that　　　B. that，which　　 C. which，that　 　D. that，that

She looks sad. Could you please tell me ____ that prevents her from being as happy as before.

　 A. what it is　　　 B. it is what

C. how it is　　　　 D. it is how

I won’t go with you because I don’t know you.　　　 ,it is too late.?

A.What’s more　　　 B.However?

C.So far　　　　　　 D.Generally speaking