31.Mike goes to see his grandparents (one) a week.32.He spen

31.
Mike goes to see his grandparents (one) a week.
32.
He spends more than an hour (exercise) every day.
33.
He didn’t go to school.He could (hard) read or write.
34.
It’s a good habit to brush your (tooth) every day.
35.
To keep healthy,I decide (exercise) half an hour every day.
36.
Look!Your pet dog is (die).
37.
Exercise is (health) for the mind and the body.
38.
Your sweater is beautiful.I want (buy) one,too.
39.
How about (go) shopping on Sundays?
40.
He usually study English by (read) it in the morning.