题目内容
（请给出正确答案）
[主观题]
The school makes it possible for the children to know what books are available by______.A．
The school makes it possible for the children to know what books are available by______.
A．rearranging all of the books every two weeks
B．arranging fortnightly visits to the book stall
C．exhibiting books to advantage
D．holding regular exhibitions of books
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