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单选题：Paragraph 4_______________
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These programmes are of immense value to old people．
These programmes are of immense value to old people． A．natural B．fatal C．tiny D．
The river widens considerably as it begins to turn west．
The river widens considerably as it begins to turn west． A．twists B．stretches C．
靖在第_____处填上正确答案。
靖在第_____处填上正确答案。A．within B．above C．to D．on
What is NOT the result of consuming fossil fuels according
What is NOT the result of consuming fossil fuels according to the last paragrap
We don’t need air conditioning, （ ）.
We don’t need air conditioning, （ ）.A．nor can we afford it B．and nor we can aff