dollars is a lot of money for me.

      dollars is a lot of money for me.

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

________ dollars ________a lot of money.

1. A.
   21 billion, is
2. B.
   21 billions, are
3. C.
   21 billion, are
4. D.
   21 billions of, are