问题
选择题
This morning when I walked by the park, I saw many children ___ there.
A．played
B．playing
C．play
D．to play
答案
答案：B
句子中“saw”为感官动词，句型为“see sb. do/doing sth.”,当我路过公园时，看见孩子们正做某事，故选B。
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