单项选择题

A．2
B．
C．0
D．1
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单项选择题
-Hi, Christopher, chatting on line seems like fun. Have you ever _____ it?- I recently have. It’s the most exciting thing I’ve ever done.A. triedB. to tryC. tryingD. try
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面试口头沟通的原则有哪些？
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