by the time we got home,the house _____empty.A.by the time we got home,the house _____empty.A.was       B.had been             C.would be                  D.has

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bythetimewegothome,thehouse_____empty.A.bythetimewegothome,thehouse_____empty.A.was   

by the time we got home,the house _____empty.A.by the time we got home,the house _____empty.A.was       B.had been             C.would be                  D.has
by the time we got home,the house _____empty.A.
by the time we got home,the house _____empty.
A.was       B.had been             C.would be                  D.has been
老师讲的答案是a
好像说是表示状态.答案b是错的.

by the time we got home,the house _____empty.A.by the time we got home,the house _____empty.A.was       B.had been             C.would be                  D.has
可以把was看成系动词 答案B是表示一个动作已经完成 但房子不可能动作 房子空了是表示房子正处于一种什么样的状态 空的状态