The chimney is no longer______volumes of waste gas into the atmosphere, as prote

游客2023-10-12 31

问题 The chimney is no longer______volumes of waste gas into the atmosphere, as protective filters are being used.

选项 A、giving away
B、giving in
C、giving off
D、giving up

答案 C

解析句意：由于使用了防护过滤器，烟囱不再向大气排放废气。give away赠送；丧失。give in屈服。give off散发出(气体、热量或气味)。give up放弃。根据句意，giving off最符合，故正确答案为C。

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