there are a lot of things for me ____. A.doing B.to do 哪一个选项对,为什么?

题目

there are a lot of things for me ____. A.doing B.to do 哪一个选项对,为什么?
there are a lot of things for me ____.
A.doing B.to do 哪一个选项对,为什么?请说明

答案

B 固定搭配,在这里必须用不定式,意思上是指现在有许多事要我去做,表目的,表将来