高考英语一轮复习Unit2Workingtheland单元检测卷新人教版必修4完整版.doc
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Unit 2 Working the land
Ⅰ. 阅读理解
A simple half-hour delay in high school start time led to a significant improvement in students’ mood, alertness, and motivation, and increased their average sleep time during the week, according to a new study.
Judith A. Owens, MD, MPH, at the Hasbro Childre
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