根据汉语完下列成句子。 1. There's a small village______ (在…脚下) the mountain. 2. The tombs______ (遍布) an area of 40km. 3. There are many trees on ______ (路的两边). 4. ______ (在过去), there was no hospital in our village. 5. Be careful and______ (确保) that you don't make mistakes.