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26.Paragraph 4____2326: A E C DA.Not doing enoughB.A global problemC.Changing work practiceD.A solution which is no solutionE.Paying to get inF.Closing city centres to traffic27. Most American drivers think it convenient to______28. If charged high enough, some drivers may______ to enter certain parts of town.29. Building more roads is not an effective way to______30. The U. S. government has planned to ______ updating publictransport systems.27—30: C A E DA.go by busB.encourage more private carsC.drive aroundD.spend more moneyE.reduce traffic jamsF.travel regularly