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

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

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