试题 试卷
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
— Very pleased to meet you, Mr. Smith.
—I can't find my ticket. The movie will start soon.
—Yes. I hope to plant trees. trees, air pollution.
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