三、Read and do.(读一读,做一做。)
健康的食物能帮助我们茁壮成长。你想更了解自己的身体吗？让我们来认识一下你的“健康小助手”——BMI(身体质量指数)吧！
Healthy food helps us grow. Do you know if(是否) you are eating healthily? Let's find out your BMI.
Step 1: Write your numbers.(写一写)
My weight(体重): kg
My height(身高): m
Step 2: Calculate.(算一算)
BMI = weight ÷ height ÷ height
My BMI = ÷ ÷ =
Step 3: Look and tick.(勾一勾)
Check this BMI table of children at each age.

答案不唯一,合理即可。