7 . 阅读下面短文，在空白处填入一个恰当的单词，首字母已给出。
Life will be peaceful if you always do kind things. I teach my daughters to d 1 a habit of helping others.
We live in the country. Most of what we see is beautiful nature. One of the exceptions to the beauty is the rubbish that some people throw out of their car windows. And there are no necessary public s 2 , such as rubbish collection.
A helping behavior that I often p 3 with my daughters is picking up rubbish in our neighborhood. My daughters often have a m 4 to see who can collect the most rubbish. They will often say to me in an excited voice, “There’s some rubbish, Daddy, stop the car!” Without t 5 more, we will often get out of our car and pick it up. Though it may seem strange, we do it. In fact, we e 6 it. We pick up rubbish in parks, on sidewalks, almost a 7 .
One day I saw a man I had never met before picking up rubbish on the road. I stopped. He r 8 his head and said to me with a smile. “I saw you doing this with your family. It’s a good idea to protect our natural world.”
There are many other ways to p 9 kindness for others. You may share a dinner with a homeless person, visit lonely old people in the nursing home, or help the blind cross the street. You can think of something that can be finished e 10 but helpful. It is fun, self-satisfying, and what’s more, it can set a good example. Helping others is helping yourself.
