（give）—more instruction,thestudents would have done the exercisemuch better答given

题目

（give）—more instruction,thestudents would have done the exercisemuch better答given
（give）—more instruction,the students would have done the exercisemuch better答given为什不是虚拟if had given

答案

the students would have done the exercisemuch better
显然是虚拟
因为主语是the students,前面一定要被动,
可以说:given
或者不用分词短语,改成复合句的分句.
if they had been given,
if had given这样不行.