【单选题】 Trees take harmful gas from the air, and ______ oxygen (氧气)into the air.
A.
[A] let out |
B.
[B] set off |
C.
[C] give up |
网考网参考答案:A
网考网解析:
let out释放,set off出发,启程,gave up放弃。 查看试题解析出处>>
【单选题】 Trees take harmful gas from the air, and ______ oxygen (氧气)into the air.
A.
[A] let out |
[B] set off |
[C] give up |
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