---Do you know_______ the books on the shelves?
--- Sorry, I can’t count them, because there are _______books.
A. a number of; the number of     B. a number of; a number
C. the number of; a number of

 ---Do you know_______ the books on the shelves?

        --- Sorry, I can’t count them, because there are _______books.

A. a number of; the number of

B. a number of; a number

C. the number of; a number of

---Do you know_______ the books on the shelves?
--- Sorry, I can’t count them, because there are _______books

1. A.
   a number of; the number of
2. B.
   a number of; a number
3. C.
   the number of; a number of

(补全单词)

The book are placed on the shelves a____ to writers.