(单选题)

What is the main idea of the passage?

A.Many teenagers lack sleep because of the early classes.

B.Many teenagers are active except in the morning.

C.Nowadays teenagers are lazy and hate going to school early.

D.Measures must be taken to stop students from sleeping in class.

参考答案：A

参考解析：

主旨大意题。A项说很多青少年因为早上上课太早而缺觉，该项正确，B项在原文中可找到原句，但不是文章的主旨。C项说现在的青少年懒，不喜欢起早上学，该项属于无中生有，D项说必须要采取措施阻止学生在课堂上睡觉，该项太过绝对。故选A。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语