1. 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

    Usually, a family has parents and children. But the structure varies in different (culture).

    In many Asian countries, extended families (大家庭) are common. Families usually have three generations (live) together. When parents are busy with work, grandparents help do the housework and take care the children.

    While in most (west) countries, many people prefer a nuclear family (核心家庭): families only parents and children. During the daytime, working parents send their children grandparents' house or daycare centres. And after work, they take the children back home. Some families are even (describe) as DINK—double income, no kids. According to 2010 Pew Research report, one in five (America) couples don't want a child.

    Although families may (different) in the East and West, every family is a warm place to teach us important values of love and care.