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题型：单选题 题类：常考题 难易度：普通
冀教版初中英语七年级下册Unit 4 Lesson 23 A Weekend With Grandma同步练习
-I can't see the blackboard(黑板 ) clearly(清楚地) . Two tall boys are sitting _____________ me.
—Yes. We've sent several astronauts to the Moon already.
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