---There are several chemical factories pouring waste water into the stream.---They may cause .

题型：单选题题类：常考题难易度：普通

仁爱科普版九年级上Unit 2 Saving the earth. Topic 1 Pollution has causestoo many problems.同步练习1

—There are several chemical factories pouring waste water into the stream.

—They may cause .

A、air pollution B、water pollution C、noise pollution D、light pollution

举一反三

{#blank#}1{#/blank#} the birthday{#blank#}2{#/blank#}, we eat a birthday cake.

—Sure. I'd be glad to.

—Yes. We play sports and have fun there.

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