Unit1Lesson2Let’sPractice习题1一、用适当的介词填空
例如:atschool1
__Mars2
__aspaceship3
__space4
__themoon二、翻译下列句子
Wherewereyoulastmonth
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ItwascoldonMars
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Wewereinaspaceship
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TherewerenotreesonMars
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