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The importance of saving gas be stressed too much. Automobiles use up some 70 bi

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The importance of saving gas be stressed too much. Automobiles use up some 70 bi

The importance of saving gas_______be stressed too much. Automobiles use up some 70 billion gallons of gas a year. 

   A.can’t       B. mustn’t          C.shouldn’t         D. may not

试题答案

A

标签：toostressedmuchuseautomobiles

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