14.I am sure he will help her if he _____ her.A knows B will know C is to know D can know这个答案是什么?A knows B will know C is to know D can know

问题描述:

14.I am sure he will help her if he _____ her.A knows B will know C is to know D can know
这个答案是什么?
A knows
B will know
C is to know
D can know

B

A knows 一般现在时