题目内容：

John is ..the age of Mary.A twice B as old as怎么选啊

优质解答

A twice是答案
译文：JOHN的年龄是玛丽的两倍.
如果是B as old as
原句应该是John is as old as Mary.
译文：John和Mary一样大.没有把年龄和人比较的,所以这样写才对