I actually believe that you______ in hospital now if you had worn seat belts at that time.A.weren’tB.had not beenC.wouldn’t have beenD.wouldn’t be
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D解析试题分析：考查虚拟语气。本题意为：若果当时戴上安全带，现在就不会躺在医院了。对过去(at that time)的虚拟，if从句用had done,主句用would do.故D项正确。
考点：虚拟语气。