—How many birds can you see in the trees?
—I can see        birds in them.

—How many birds can you see in the trees?

—I can see        birds in them.

A．hundreds of       B．five hundreds      C．hundred of        D．five hundreds of

—How many birds can you see in the trees?
—I can see        birds in them.

1. A.
   hundreds of
2. B.
   five hundreds
3. C.
   hundred of
4. D.
   five hundreds of