—The environmental problems are still serious today though the government have taken actions. —That's true. Pollution from factories ________ our efforts to make our world cleaner.

题型：单选题题类：常考题难易度：容易

牛津版（深圳•广州）初中英语九年级下册Module 3 Sport and health Unit 6 Caring for your health单元综合能力检测题（音频暂未更新）

—The environmental problems are still serious today though the government have taken actions.

—That's true. Pollution from factories ________ our efforts to make our world cleaner.

A、compares with B、cancels out C、sets off

举一反三

— It ______ wood.

—Because my little sister was ill.I had to look after her.

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