【題目】The government is trying to （reducing）pollution to an even lower level so that we can have a better environment.

【答案】reduce
【解析】句意：政府正在努力把污染減少到一個(gè)更低的水平，以便我們能夠有一個(gè)更好的環(huán)境。reduce“減少”，try to do固定短語”努力做.....“，因此填reduce。

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