题目内容：

There are more than twice ______ five years ago.a.as many books as b.many books as

优质解答

A
意思:如今书的数量比五年前的两倍还要多.
解析:
这是个表达倍数的句型:
as ...as...和……一样……
more than .比……还多
希望能够帮助到您.