This exercise is so difficult that few of us can do it.为什么后面的it 不能省略?
问题描述:
This exercise is so difficult that few of us can do it.为什么后面的it 不能省略?
答
it是句子的宾语成分,省略后句子变不完整了
答
do后面需要跟宾语 it指代前面提到的This exercise
不能省略
答
that few of us can do it 是个独立的句子,do 是及物动词,后要跟宾语.