The house prices have fallen during the last few months, but what ________ us is that they may go up soon after．

1. A.
   worried
2. B.
   worries
3. C.
   will worry
4. D.
   had worried

The house prices have fallen during the last few months, but what ______ us is that they may go up soon after.

       A．worried          B．worries             C．will worry          D．had worried