The last time I Jack he football with classmates.A. had seen; was playingB. saw; played

问题补充：

The last time I Jack, he football with classmates.

A. had seen; was playing

B. saw; played

C. had seen; playing

D. saw; was playing

答案：

A. had seen; was playing

B. saw; played

C. had seen; playing

(答案→)D. saw; was playing

解析：考查时态。句意：我上次看见杰克时，他正在和同学们踢足球。结合语境可知前文时间状语可知从句描述的是过去的动作，结合语境可知下文描述的是过去正在进行的动作。故选D。