题目

Long long ago, there was a small village. This village had a 36 tradition. At the beginning of every year, any boy who had reached the age of 18 was given land and money to build a home. The boy had to37 his home before winter. If his home failed to endure the cold weather in winter, the villagers could not 38 him in any way.One39 , Paul and Marc reached their 18. They40 their land and money and decided to search nearby villages for ideas on building their homes. In each village, they found the nicest41 and talked to the owners. Each owner gladly offered42 .After Marc saw several homes, 10．美丽富饶的新疆地区成为我国不可分割的领土，开始于（　　）A．张骞通西域B．班超经营西域C．丝绸之路开通D．西汉政府设立西域都护