来自裴波的问题
【Ourteachersaidsound()muchmoreslowlythanlight?填什么及原因AtraveledBwadtravelingChastraveledDtravels】
Ourteachersaidsound()muchmoreslowlythanlight?填什么及原因
AtraveledBwadtravelingChastraveledDtravels


【Ourteachersaidsound()muchmoreslowlythanlight?填什么及原因AtraveledBwadtravelingChastraveledDtravels】
Ourteachersaidsound()muchmoreslowlythanlight?填什么及原因
AtraveledBwadtravelingChastraveledDtravels
D表示一般常理道理知识的时候动词都用一般现在时比如地球绕着太阳转theearthcirclesthesun