Evans Wadongo was from a village in Kenya. His parents were both teachers, and they believed 1 was very important. They told their children to work hard. Wadongo walked over six miles (9.6kilometers) to school every day. After school, he did his homework. 2 , as in many homes in poor Kenya, his house did not have electricity（电）. So, at night, Wadongo had to do his homework by the light of an kerosene lamp(煤油灯). Wadongo began to have problems with his eyes and 3 made studying difficult. He was worried because his grades were not as good as he 4 . He knew that students who had electricity had a better environment(环境). "I couldn't 5 with them," he said. " In every home in the village, it was 6 . Many children end their study for this reason, so they stay poor in their life."

Although studying was difficult, Wadongo was an excellent student. 7 high school, he went to a university for further study. He came to know that kerosene was not just bad for schoolchildren. It was bad for 8 . First, it can result in illnesses such as coughs. Also, the light from a kerosene lamp is not very strong enough, so reading by the light of a kerosene lamp is bad for people's eyes. This type of fuel burns very easily, which can lead to fires. Lastly, kerosene is expensive, so families have 9 money for food and other living needs. He really wanted to do 10  for the people in his country. Can we help him?