They said they wanted to know ( )do to help us.A:what they can B:how they can
问题描述：
They said they wanted to know ( )do to help us.A:what they can B:how they can
C:how can they D:what 为什么不选B 怎么做也很通顺的.
D what can they do
答
how引导的方式壮语,整个句子是how引导的宾语从句,既然是壮语,就只能充当句子当中的壮语成份,而本题do后面缺的是宾语,因此能做宾语的就是what了!选A