No matter_ difficult problems we meet.we will try our best to get them over.
问题描述：
No matter_ difficult problems we meet.we will try our best to get them over.
A.how B.what
答
No matter_what difficult problems we meet.we will try our best to get them over.如果改为no matter_ difficult the problem we meet.应该选择哪个啊how能解释下吗因为problem前有个the，所以前面的中心词是形容词difficult，那就用how来修饰