阅读下面短文,从短文后各题所给的A、B、C、O四个选项中,选出可以填入空白处的最佳选项。

   Do students in other countries also have so much homework? What do they do in their spare time? On April 8, a ____  (1)  ____ wrote out on the lives of high school students in China, Japan, South Korea and the US. You will find the answers ____  (2)  __ many of your questions in this report.

   Who studies hardest?

   Chinese students spend the most time ____  (3)  ___. Nearly half of Chinese students spend more than two hours ____  (4)  ____ their homework every day. That's much ____  (5)  ____ than the students of the US (26.4%), Japan (8.2%) and South Korea (5.2%).

   Who sleeps most often in class?

   ____  (6)  ___ students fall asleep in class more often, about 45% of them say they sometimes doze off (打瞌睡) in class. In South Korea, it's 32%, in the US, 21%, and 5% in China.

   Who is the most distracted (分心的)?

   American students are the most ___（7）___ in class, but also the most distracted: 64% say they chat with their friends in class; 46.9% say they eat snacks in class; and 38.9% say they send e-mails or read some books which have nothing to do with their ___（8）___ in class.

   ____  (7)  ____ do they do in after school?

   In their ___（10）___ time, most Chinese students study or surf the Internet. Most American students spent a lot of time staying with their friends. Most Japanese students do physical exercises. Most South Korean students watch TV.