一道英语的单项选择题
问题描述：
一道英语的单项选择题
--I don't know _______ with the problem .what should i do
--You can ask Mr Wang for help.
A how to do B what to do
我选择了A,但答案上是B,我不理解.谁能说出为什么.
答
what to do with sth有这样一个用法,what是修饰名词的,how 是修饰形容词或动词的