小测验：选择正确的单词

1. The sidewalk abutted on the river.
   人行道紧挨着河川。
2. Rolled down the sidewalk on their scooters.
   踏滑板沿人行道翻滚下来
3. a sidewalk fruit stand;sidewalk chalk artists.
   街旁的一水果摊;街头粉笔画师
4. He took a nasty flop on that slippery sidewalk.
   他在那打滑的人行道上跌得很惨。
5. This sidewalk is made of slabs of stone.
   这一人行道是用石板铺成的。

　1个名词解释