He was ___the teacher's question .A quickly to understand B quick to understand 这里为什么用B 为什么不用副词呢、?

问题描述:

He was ___the teacher's question .
A quickly to understand B quick to understand
这里为什么用B 为什么不用副词呢、?

be quick to do 很快做某事
因为有个BE 所以要用QUICK
用QUICKLY 的话则是 He quickly understand the teacher's question .