—Tommy, _________ do you play the piano?—When my mom is at home, I have to every day, but she’s away this week!

—____ do you clean your room?—Every two days.

We don’t believe _____ little children can do ____ much work in such a short time.

They are going to have a picnic _______ next week.

—Did you find the small village yesterday?—Yes，without any difficulty，for it has ________ changed over years.