—What’s your last name?—Green. 

Do you have any other _____ to make on the subject?

There are five circles with different colours on the flag of Olympic Games. They are green, blue, red        and       . 

—What’s your favorite ________, John?—Swimming，of course.

If you want to be healthier, you shouldn't do _____ in the classroom all the        time but do more _____ on the playground.