选择单词填空

题目

选择单词填空
school cars easy air exercise use
Many people in the world ride bicycles every day.There are more bicycles than ______in the world today.A lot of Chinese people ride bicycles to go to work or ______.Bicycles are much cheaper than cars,And it is ______for people to learn to ride.Bicycles are also uesd for ______.It helps us to keep fit.If each family has a car,it will ______a lot of energy and pollute the ______.So let us ride bicycles.

答案

cars
school
easy
exercise
use
air