查一篇开头为we are lucky to live in a rich country where we have many things

We are lucky to live in a rich country where we have many things. However, most of us usually waste some things.
Electricity(电) is one thing that we waste most. Lights, TVs, 47 and other things are often kept on even when no one is using them. We should turn them off when we do not need them. It 48 less than a second to do it. Anyhow, not wasting electricity save（节省）money, because we do not have to 49 the electricity we do not use.
The second thing that we often waste is water. Fresh water is precious(宝贵的), 50 it shouldn’t be wasted. It is only a simple matter of turning off a tap（水龙头）. I am sure 51 can do this easily if he wants to.
52 big waste is food. My mother 53 cook so much food that much of it was thrown away. I told her we had wasted so much food. She thought I was right and now cooks 54 what we can eat.
It is 55 to be wasteful. I find there is a simple way of not wasting things. That is to use only what we need . Do not to