Clouds are gathering．I think we’d better ________ the school in case it starts to rain．

1. A.
   run out
2. B.
   bring up
3. C.
   refer to
4. D.
   head for

Clouds are gathering．I think we’d better ________ the school in case it starts to rain.

A．run out         B．bring up        C．refer to         D．head for