how many后面加什么名词

　　how many例句：

　　1、How many countries took part in the last Olympic Games?

　　有多少国家参加了上届奥运会？

　　2、How many candidates are standing for election?

　　有多少候选人参加竞选？

　　3、How many people were there?

　　有多少人？

　　4、How many days did you take off?

　　你休了几天假？

　　5、How many children do you have?

　　你有几个孩子？