The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____

_______ do you usually go to school?— Onfoot.

Mum, would you please buy me an MP5 player? — If you can help do some housework the whole vacation，you _______ have one as a reward.

Never give up and you’ll succeed.—Thank youi won’t ______ you

Only by following this method　　　.