I hear many people are on the beach after the rainstorm for there ________ thousands of kinds of seashells.

1. A.
   being
2. B.
   are
3. C.
   having
4. D.
   have

I hear many people are on the beach after the rainstorm for there       thousands of kinds of seashells.

A．being        B．are    C．having      D．have