人教版九年级英语 Unit 13 We’re trying to save the earth! 测试卷
(满分:100分 时间:45分钟)
一、单项选择(每题2分,共30分)
1. The earth is in danger and we must ______ it.
A.protect B.to protect C.protecting D.protected
2. These old newspapers can ______ recycled.
A.is B.are C.be D.been



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