he studied the picture,which ___ in the summer time

问题描述:

he studied the picture,which ___ in the summer time
A.has taken
B.had been taken
C.has been taken
D.taken
选择B.为什么用过去完成时啊

picture 是物品啊,要用被动语态 比如picture is taken.
而这句话是定语从句,主句已经用了一般过去时,那么从句也需要使用【过去时态】,那么这四个选项里,只有B是过去完成时的被动语态,因此选B.