高考英语一轮复习Unit2Workingtheland单元检测卷新人版必修.doc

WORD格式可编辑 PAGE 专业知识整理分享 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 Children’s Hospital in Providence, R.I., and colleagues studied 201 students in grades nine through 12 attending a Rhode Island high school where the class start time was changed from 8 a.m.to 8:30 a.m. for a two-month period. Students completed online surveys before the change in class time and then after. Owens and her team found that: ★The percentage of students getting less than seven hours of sleep per night dropped by 79.4%. ★Students reporting at least eight hours of sleep per night increased from 16.4% at the start of the study to 54.7% after two months. ★The percentage of students who reported feeling at least somewhat unhappy or depressed dropped from 65.8%to 45.1%. ★The percentage of students who reported feeling annoyed throughout the day also dropped, from 84%to 62.6%. ★Reports of visiting a health center for tiredness-connected signs decreased from 15.3%to 4.6%. The findings are published in the July issue of Archives of Pediatrics Adolescent Medicine. Adjusting school times for teenagers is a controversial topic because some experts argue that a later class start time will result in students going to bed later and make the cycle of getting too little sleep worse. The researchers note that a later class start time led to the opposite effect-kids went to bed a little earlier and their overall sleep quality and duration(持续时间) improved.The researchers write that the school faculty（全体教员） did not favor the delayed class start time, but after seeing the students’ change in attitude and performance, everyone had a change of heart. 1.According to the new study we know delayed class start time