There are _____ birds in the forest.

         A. millions of   B. two millions of   C. two millions

There are ________ birds in the picture.

1. A.
   some
2. B.
   any
3. C.
   an
4. D.
   a

There are ________ birds in the sky．

1. A.
   two thousands
2. B.
   thousands of
3. C.
   thousand of
4. D.
   two thousands of

There are _____ birds in the forest

1. A.
   millions of
2. B.
   two millions of
3. C.
   two millions