Question

【题目】When I walked past the park, I saw some old people _________ Chinese Taiji.

A.do
B.did
C.doing
D.are doing

Answer 1

【答案】C
【解析】考查现在分词作宾语补足语。see sb doing sth 看见某人正做某事，see sb do sth 看见某人做了某事。句意：当我走路经过公园的时候，我看见一些老人打太极拳。故选答案C。