A、New technology. B、Serious air pollution. C、Good public services. D、Low-income housing. D

　　(5) Solar panels are an increasingly common sight on the tops of homes in wealthy parts of Washington, D.C. Now the costly technology is moving into a poorer area of the city. And, the people who live there are getting the panels for free.
　　(6) Southeast Washington, D. C. is an area known more for low-income housing than new technology. But several homes in Southeast are now topped with solar panels. Local officials make these solar panels available to residents whose yearly earnings are at or below $ 50 500 for a family of three. A family of four can make up to $ 60 000 a year and qualify for the panels.
　　The program is paid for with fees from factories and oil processing centers for their carbon dioxide emissions. (7) Government officials expect millions of dollars in savings as the solar panels become more popular. They believe energy subsidies to poor families will be cut and electric costs will go down. They add that new jobs will be created. Washington officials hope to start a program next year to help small businesses install solar panels on their buildings. They hope to turn the nation’s capital into an environmentally-clean solar city.
　　5. What is the main idea of the news report?
　　6. What is Southeast Washington, D. C. well known for?
　　7. What benefit do government officials expect?