问题
选择题
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
答案
答案：A
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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
答案：A