You weren't in when I phoned you yesterday afternoon

问题描述:

You weren't in when I phoned you yesterday afternoon
补充:A:You weren't in when I phoned you yesterday afternoon
B:I ( ) shopping at a supermarket then.
a,did b,had done c,was doing d,am doing

选c
很明显是过去进行时.当你打电话时,我正在购物.其余选项都不对.