小强同学学习了生物遗传和变异的知识后，对性状的遗传现象很感兴趣．图是小强对家族内有无耳垂性状的调查示意图．请你根据图中提供的信息，回答问题：

根据句意及首字母或汉语提示，完成下列单词。 
（1）The e____ is the biggest animal on land.
（2）The old man p____  trees in spring every year.
（3）My hobby is c____ stamps（邮票）.
（4）It's d____ to play football in the street.
（5）Will you i____your teachers to your birthday party?