Trees take harmful gas from the air, and ______ oxygen (氧气)into the air.A、let

游客2025-07-11 1

问题 Trees take harmful gas from the air, and ______ oxygen (氧气)into the air.

选项 A、let out
B、set off
C、give up

答案 A

解析 let out释放，set off出发，启程，gave up放弃。

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Treestakeharmfulgasfromtheair,and______oxygen(氧气)intotheair.A、let