—What were you doing when she dropped in? —I for a while and some reading.A. was playing;

问题补充：

—What were you doing when she dropped 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：本题的时态考查具有一定的迷惑性。“she dropped in”发生于“play’与“do some reading’之间，故play用过去完成时，而do some reading用过去将来时。