Thelittleboycameridingfullspeeddownthemotorwayonhisbicycle._____itwas!A.Whatadang
A.WhatadangeroussceneB.WhatdangerousasceneC.HowadangerousD.Howdangerousthescene我想问为什么把D选项中的the改成a就正确了,