Mary had to take her two little twin sis-ters,Tina and Sarah,5 years old,with her tothe grocery store.The grocery store had shop-ping carts that looked like little race cars forchildren,including two steering wheels(方向盘).Mary put them in the cart and said,“Okay,let’s pretend you’re driving this car.Iwant you to keep both your hands on yourwheel at all times,and don’t take your eyesoff the road.Everything was going very well Mary had to take her two little twin sis-ters, Tina and Sarah, 5 years old, with her tothe grocery store. The grocery store had shop-ping carts that looked like little race cars for childrens, including two steering wheels. Mary put them in the cart and said, ”Okay, let’s pretend you’re driving this car.Iwant you to keep both your hands on yourwheel at all times, and do not take your eyesoff the road. Everything was going very well