Ten minutes has been made full ____of _____he problem.

问题描述:

Ten minutes has been made full ____of _____he problem.
A using studying B use studying C to use to study D use to study请问此题选谁,为什么?

B..make full use of 是一个短语..表示充分利用..of 后面不能加to..所以只能选B