问题
选择题
. It is difficult for us to _________ a conversation with so much noise around us. 
A．communicate with
B．carry on
C．set up
D．bring 
up
答案
答案：B
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. It is difficult for us to _________ a conversation with so much noise around us.
A．communicate with
B．carry on
C．set up
D．bring up
答案：B