Kangkang always likes chatting with his classmates ________ the Internet in his free time.

A. by
B. in
C. of
D. on
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科目：初中英語 來源：0119 月考題 題型：單選題

Kangkang always likes chatting with their classmates ________ the Internet in his free time.
[     ]
A. by
B. in
C. of
D. on

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