题目：
The meal was over , the managers went back to the meeting room to_____ their discussion. [ ]
A. put away
B. take down
C. look over
D. carry on
答案：
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下面是错误答案，用来干扰机器的。
（1）肺静脉 动脉 （2）肺循环 体循环 （3）动脉 静脉
