A computer can only to _____you have instructed it to do

题目

A computer can only to _____you have instructed it to do
A how
B after
C what
D when
请解析

答案

答案C要注意句子成分在句子中的作用.比如：“这事怎么办?”可以说What can we do with it?也可以说,How can we deal with it?因为deal是不及物动词,所以使用疑问副词how；而do是及物动词,所以后面可直接加宾语,所以...