题目

It was a winter morning, just a couple of weeks before Christmas 2005. While most people were warming up their ears, Trevor, my husband, had to get up early to ride his bike four kilometers away from home to work. On arrival, he parked his bike outside the back door as he usually does. After putting in 10 hours of labor, he returned to find his bike gone. The bike, a black Kona 18 speed, was our only transport. Trevor used it to get to work, putting in 60-hour weeks to support his young family. And the bike was also used to get groceries (食品杂货) saving us from having to walk long distan每次摸出1个球再放回去，在每个口袋里都摸20次，结果会是怎样？连一连．