__________ for several hours, they came to realize that they had a lot in common.

A. Having chatted
B. chatted
C. To chat
D. Chatting
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科目：高中英語 來源：吉林省期末題 題型：單選題

__________ for several hours, they came to realize that they had a lot in common.

[     ]

A. Having chatted
B. chatted
C. To chat
D. Chatting

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