用所给词的正确形式填空 1、He __ (exercise) three or four times a week.
2、Do you ___(clean) you room by yourself?
3、What time does he usually ___ (practice) his guitar?
4、He left the room without___ (say) anything.
5、It's raining___ (heavy) outside,isn't it?
6、Here are the ___ (result) of the students,activity at Hilltop High School.
7、We must keep ___ (health).
8、He___(watch)TV twice a week.