問題詳情

Most high schools begin their day at around 7:30 a.m., which leaves many teenagers nodding off in themorning. In fact, at least 20 percent of high school students 39 in class on a typical day. The problem:teenagers need a lot of 40 —about nine hours each night, experts say. And most of them aren’t gettingenough.To help sleepy teens, some school districts have tried 41 the opening of the high school day. Kyla Wahlstrom,an educational researcher, has been following school districts that changed their 42 . One district changed its starttime from 7:20 a.m. to 8:40 a.m., and Wahlstrom says the students have benefited from the change.
39
(A) chat away
(B) fall asleep
(C) hang out
(D) mess around

參考答案

答案：B
難度：簡單0.876923
統計：A(4),B(114),C(10),D(2),E(0)

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