He saw a boy _____on the truck when he got off the train. [ ]A. played B. to play C. playing D. is p

题目简介

He saw a boy _____on the truck when he got off the train. [ ]A. played B. to play C. playing D. is p

题目详情

He saw a boy _____ on the truck when he got off the train.
[     ]
A. played
B. to play
C. playing
D. is playing
题型:单选题难度:中档来源:同步题

答案

C

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