--- How many books does the little boy have?
---He has         books.

--- How many books does the little boy have?

---He has         books.

A．two thousands                         B．one thousand of

C．thousands of                           D．two thousands of

--- How many books does the little boy have?
---He has         books.

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

--- How many books does the little boy have?

---He has 　　　 books.

　 A. two thousands　　 B. one thousand of 　　 C. thousands of　　 D. two thousands of