We have a big library in our school. There are more than twice ________ five years ago.

We have a big library in our school. There are more than twice ________ five years ago.

A.books than

B.as many books as

C.many books as

D.many more books than

答案及解析： B

解析：

此题用as...as...结构，表示“像……一样多”。