英语：词汇练习,根据句意及首字母或汉语提示完成下列句子.
1.-Is his h_____taking photos or collecting stamps?
-Neither.It's watching TV.
2.Mike,you've s_____too much time watching TV.You'd better turn it off.
3.It is not as difficult as you i_____.
4.If you want to keeo yout room clean and t_____,it must be cleand every day.
5.This boy showed his stamp_____(收藏)to me.
6.Bill is_____(懒惰).By the time he should go to school,he's still in bed.
7.Why not go_____( 驾驶帆船)with us in the sea?
8.It is a_____(有用的)book.I borrowed it from the school library.