We walked in so quietly that the nurse
at the desk didn’t even lift her eyes from the book. Mum pointed at a big chair
by the door and I knew she wanted me to sit down. While I watched, mouth open in
surprise, Mum took off her hat and coat and gave them to me to hold. She walked
quietly to the small room by the lift and took out a wet mop. She pushed the mop
past the desk and as the nurse looked up, Mum nodded and said, "Very dirty
floors." "Yes. I’m glad they’ve finally decided to clean them," the nurse answered. She looked at Mum strangely and said, "But aren’t you working late" Mum just pushed harder, each swipe of the mop taking her farther and farther down the hall. I watched until she was out of sight and the nurse bad turned back to writing in the big book. After a long time Mum came back. Her eyes were shining. A. to clean the floor B. to please the nurse C. to see a patient D. to surprise the story-teller [填空题]Our demand for electricity is climbing so fast that over the next decade U.S. generating capacity must increase by a third. Fossil fuels supply nearly three-quarters of this energy. But the smoke-belching stacks of coal-fired, gas-fired and oil-fired plants are also responsible for about half of our air pollution.
That, we used to think, is a small price to pay for progress. But there is an alternative, one that produces no smoke and can actually create more fuel than it consumes. In many regions it is even cheaper than coal-fired electricity: nuclear power. Already nuclear power is the second largest source of our electricity, and a new family of "failsafe" nuclear reactors — some now under construction in Japan — may one day make nuclear power even cheaper and more plentiful. The only major difference between nuclear and conventional plants is that nuclear fuel is far more radioactive. For this reason, the core must be sealed from the outside environment — and so 我来回答: 提交
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