We first think of the traditional or nuclear family．This is a tw

We first think of the traditional or nuclear family．This is a two-generation family,the father and the mother and their own children．Most couples wanted to have four children,two boys,two girls. Some nuclear families,however,may add one or more grandparents to come to live with them,that is three generations．This kind of family with grandparents,parents,and grandchildren is called an extended family．This family type was not very common during the later half of the twentieth century,but it's becoming more common now as an elderly grandparent moves in to live with a son or daughter．This is more possible now that American homes have become larger．What is interesting,however,is that after the grandchildren move out of the home and start their own families,this extended family shrinks back to a nuclear family,with just two generations again living together,a grandparent and parents,with the grandchildren coming only for occasional visits． Now,the fatherless or motherless family is one kind of what we call a single-parent family．In the fatherless family it's just the mother and her children．As I said,this can be the result of the husband's death,of an unmarried mother,of a separation or divorce．There are also a growing number of motherless families--where the father raises the children,for any of the same reasons．A motherless family may also be fatherless,but still a family with one adult．This is becoming more common in the big cities where a grandmother will raise her daughter's children while the daughter goes elsewhere to work. One other new kind of family is becoming increasingly more common．A single parent with one or more children will marry again．Perhaps the other parent is also a single parent．Together they will start what is called a blended family,which blends together or combines the children from two other families. Which of the following is the best title of this passage?
A、Famil
B、American Familie
C、Family Type
D、Four Family Types in Americ
【正确答案】：D
【题目解析】：本文首先介绍了传统的或核心家庭（nuclear family），即两代人的家庭，包括父母和他们的孩子。接着，文章描述了扩展家庭（extended family），即包括祖父母、父母和孙辈的三代同堂家庭。之后，文章又提到了单亲家庭（single-parent family），这种家庭由一位父亲或母亲及其孩子组成。最后，文章描述了混合家庭（blended family），即由两位各自带有孩子的单亲组成的家庭。 现在我们来逐一分析选项： A. Famil（这个选项似乎是一个不完整的单词，可能指的是“family”，但即使完整，它也太过于宽泛，无法准确概括文章的内容） B. American Familie（这个选项的拼写错误，正确的应该是“American Family”，但即便如此，它仍然只指向美国的家庭，而没有涵盖文章提到的多种家庭类型） C. Family Type（这个选项虽然提到了“家庭类型”，但它没有特指“美国”这一地理范围，而且从文章的描述来看，文章是专门在讨论美国的不同家庭类型） D. Four Family Types in America（这个选项明确指出了文章的主题，即美国的四种家庭类型，与文章的内容高度一致） 综上所述，D选项“Four Family Types in America”最能准确地概括文章的主题，因此是最佳标题。