问题补充:
—— 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
答案:
A. was playing; was going to do
B. played; did
(答案→)C. had played; was going to do
D. had played; did
解析:play 在came in 之前已完成,而do some reading 的动作则即将开始。