4. It is advised that when you are out for short periods, you may hire ______ to be baby-sitters.

　　A. motherly women B. retired people

　　C. young people D. mature women

　　5. The best title for the passage is ______.

　　A. American Families

　　B. Baby-Sitters

　　C. A Way of Earning Money for Young Students

　　D. A Best Way to Find Baby-Sitters

　　答案：

　　1. A。根据题干中的“infer”可以排除B项和D项，因为这两项在文中有直接体现，而非读 者通过阅读之后“推断”出来的内容，C项表述错误。故答案为A。

　　2. C。根据理解以及短文第一段的说明“A ‘sitter’ is someone who is hired to care for children for a specific length of time—usually relatively short—while the parents are out … ”可以知 道，故答案为C。

　　3. D。短文中并没有提及对这一职业的性别限制，所以应该是全部都可以，故答案为D。

　　4. C。由第一段“For short periods, teen-agers, colleges students, nursing students, and others are commonly employed on an hourly basis.”可以知道，短期的保姆就雇佣青年人比较合适。

　　5. B。本题比较简单，B选项概括了短文的内容，而且比较简练。