2016年前两个月，全国全社会用电量累计8 762亿千瓦时，同比增长2%。其中，2月份当月全社会用电量同比增长4%，同时，工业用电量同比下降了2%；第三产业用电量同比增长11.9%，2月份当月增速高达15.7%。通过用电量变化情况我们可以得出的合理结论有（  ）

阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。

    "Never give up!" It is my law(法则) of life. It has brought me 1. I learned the law from my father's 2 story.

    My father was 3 in a poor village in the north of Jiangsu, in China. When he was a young boy, he went to school in the morning, then 4 in the fields till sunset. And then he did his homework 5 midnight. Life was hard, because they had no 6!

    At the age of 14, my father heard of the United States of America. It was the land of gold, the land where 7 people can become rich.

    "8 don't I go to America?" he thought to himself, full of hope.

    So my father came to America. “I had thought it was easy to 9 money in America," he told me. "But when I arrived there, I realized it was not true.  They did not like to hire (雇佣) me because I spoke 10 English. Later, I worked in a small restaurant, cleaning up tables, 11 dishes and sweeping the floor. Life was 12 for the first few years. I worked from 10 a.m. to 11 p. m. I wanted to go to school to learn English, but it was impossible. I couldn't  13 the schooling (学费). "

    My father 14 working hard, and reached his goal.

    "Alan," he often says to me. "If you want something, you have to work for it and never give up. Things do not come 15 in life." That is what I learned from my father.

利用生物防治原理采用天敌消灭害虫，可以减少农药对环境的污染。