Reading 5: Solar energy is a long-lasting source of energy which can be (1) ____ almost anywhere. To generate solar energy, we only need solar cells and the (2) ____! Solar cells can easily be installed (3) ____ house roofs, so no new space is needed and each user can quietly generate their own energy. Compared to other renewable sources, they also possess many advantages. Wind and water power rely on turbines (4) ____ are noisy, expensive and easy to break down. Solar cells are totally silent and (5) ____. As they have no moving parts, they require little maintenance and have a long lifetime. 1. A. use B. using C. used D. to use 2. A. moon B. sun C. earth D. starts 3. A. on B. in C. at D. under 4. A. where B. how C. what D. which 5. A. non-polluting B. polluted C. non-polluted D. polluting