问题
选择题
While I was in the Disneyland, I saw some children _____ in the roller coaster, laughing happily. [ ]
A. sit
B. seat
C. to sit
D. sitting
答案
答案：D
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While I was in the Disneyland, I saw some children _____ in the roller coaster, laughing happily. [ ]
A. sit
B. seat
C. to sit
D. sitting
答案：D