__________ is announced in today’s paper,they have succeeded in solving many problems in accordance with the new theory.?

A.It        B.That            C.What          D.As?

______ is announced in today’s paper,they have succeeded in solving many problems in accordance with the new theory.

1. A.
   It
2. B.
   That
3. C.
   What
4. D.
   As

______ is announced in today’s paper, they have succeeded in solving many problems in accordance with the new theory.

   A. Which                B. It                             C. As                           D. That

________ is announced in today's paper, they have succeeded in solving many problems in accordance with the new theory．

A．It          B．That         C．As           D．What