A survey basing on 1,000 students found that 80% of senior students slept less than
1.based
nine hours every night.Too much homework being given by school teachers is the main
2.去掉
cause.Another cause lies at students' bad habits.Some students are absent-minded while
3.in
doing their homework,and some wasting their after-class time.The third cause is ∧ some
4.waste 5 .that
students have to get up earlier on weekdays to get to school which ∧ far away from home.
6.early 7.is(或删which)
Experts think the amount of homeworks for the students should be cut down. Beside ,
8.homework 9.Besides
teachers should encourage their students ∧ make good use of their spare time.
10.to