Copernicusmaintainedthattheearth_____roundthesun.
A
表述永恒的真理或客观规律用一般现在时， 不管主句谓语用什么时态。 而“地球 绕着太阳转 ”是客观规律，所以选 a
Hedrovefastandarrivedanhour_____ofschedule.
Hisarticleisbetterthan_____intheclass.
Thedriverpulled_____atthetrafficlights.
Thosepeople_____ageneralunderstandingofthepresentsituation.
Yourbikeneeds_____.You‘dbetterdoirightnow.
