How often to the dentist？A、you go toB、do youC、do you go

听力原文：How often do we need to change the oil in the car？ （A) Every 3 months or every 3,

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—Will you go fishing with me this weekend？ —Sorry, ______. Im going to see the dentist.A．I

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How often（)to the dentist？A. you go toB. do you goC. do you

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I want to go to the dentist, but you ______ with me.A、need not to goB、do not need goC、ne

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According to the writer how often should parents

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I ______ to know how often the bus runs during ru

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It is often difficult for a man to be quite sure how much tax he ought to pay to the gov

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