Now most families have only one child _____ our country’s one-child policy.
The boy __ exercises, so he has to see the doctor because of overweight.
Be _ . Make sure not to make the same spelling mistake next time.
-- I haven't seen you for a long time. How's it going? -- .
Don't copy others' work. If you do it by , you'll feel much better.
You won't feel happy at school you get on well with your classmates.