一道英语单选题目.This math problem is too difficult .Can you show me
一道英语单选题目.
This math problem is too difficult .Can you show me____?
A what to work out B to work it out C how to work it out D how to work out it.
这题是选择C,我想问下这一题是要怎么思考的,为什么不能选择A呢?
老师回答慢点不要紧,但是一定要一次说清楚,我手机不好追问.