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【题目】We ________ oxygen _______ the air and release ( 释放 ) CO2 into the air.
A.take in,from
B.release,into
C.take,into
D.release,from

【答案】A
【解析】take in oxygen 吸入氧气,句意是:我们从空气中吸入氧气,并释放出二氧化碳。根据句意选 A。

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