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 Hehasbeen       thecomputerfortwohours,chattingwithabo...

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問題詳情:

 Hehasbeen       thecomputerfortwohours,chattingwithabo...

 He has been        the computer for two hours, chatting with a boy from Australia.

   A. in                       B. on                           C. at                            D. by

【回答】

C

知識點:介詞

題型:選擇題

標籤:Hehasbeen