The teachen said we (should have studied) ten lessons by the end of this term
问题描述：
The teachen said we (should have studied) ten lessons by the end of this term
The teachen said we _____ten lessons by the end of this term.
A.should have studied B.were going to sudy
C.have sdudied D.shoud study
为什么要选A呢?
答
虚拟语气
虚拟语气要用 Should 排除BC
过去的虚拟用Should have done