五、根据上下文和首字母提示补全短文,每空一词。
Tips about riding a bike
If (如果) you are under twelve years old, you cannot ride a bike on the 1. r. You can ride in the park.
The bike should be just right for you. If your bike is too big or too small, it is not 2. s.
You should 3. w a helmet. It should be the right size (尺寸) for you.
Don't ride a bike in bad 4. w. You should not go out with your bike in the rain, snow or strong wind.
You should 5. c the road at the zebra crossing, and you should get off your bike.