What were you up to when your parents came in?— I__for a while and__some reading.

问题描述:

What were you up to when your parents came in?— I__for a while and__some reading.
A.was playing; was going to do B.played; did
C.had played; was going to do D.had played; did
为什么选c不选d啊?

这段对话的准确意思是:
——你爸妈进来时,你正在做什么
----我已经玩了一会儿了,正准备看会儿书.
理解了意思,时态自然就能选对!