下列几种动物群体中，不具有社会行为的是（　　）

    Many of us were raised with the saying "Waste not, want not.” None of us,____, can completely avoid waste in our lives.

    Any kind of waste is thoughtless. Whether we waste our potential talents, our own time, our limited natural____（资源）,our money, or other people's time, each of us can become more aware and careful. The smallest good habits can make a big ____.  It's a good feeling to know in our hearts we are doing our____in a world that is in serious trouble.  By focusing on ____（节省）oil, water, paper, food, and clothing, we are playing a part____ cutting down on waste.

    We must keep reminding ____（自己）that it is easier to get into something ____it is to get out of it. Actually, severe damaged ____to our land is fairly recent in the history of our evolution.  It's time for us to____no to waste so that our grandchildren's children will be able to develop well.  We can't solve all the problems of waste, but we can encourage mindfulness.

    Waste not！

大气运动的根本原因是（　）

氧气是一种化学性质活泼的气体，许多物质都可以跟氧气发生化学反应，这类反应属于 ____。