5.He looked as if he _____ ill for a long time A.was   B.Were C.has been   D.had been

问题描述:

5.He looked as if he _____ ill for a long time A.was   B.Were C.has been   D.had been

首先看到后面的for a long time 可知这是一个持续时间所以要用完成时
其次.时态要前后一致.而且as if后面要用虚拟语气.要变成过去时.过去的过去就用过去完成时
亲.我老师是这么教我的.加油.记得一定要选我阿