When people travel to another city or country, they sometimes stay in the homes of the local people. This is called a homestay.
题意:
什么是家庭寄宿?
根据第一段,前两句When people travel to another city or country, they sometimes stay in the homes of the local people. This is called a homestay.当人们到另一个城市或国家旅游时,他们有时会住在当地人的家里。这叫做家庭寄宿。可知,这里是家庭寄宿的定义。故答When people travel to another city or country, they sometimes stay in the homes of the local people. This is called a homestay.