Copernicusmaintainedthattheearth_____roundthesun.
A、movesA
表述永恒的真理或客觀規律用一般現在時， 不管主句謂語用什么時態。 而“地球 繞著太陽轉 ”是客觀規律，所以選 a
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
Ifhe_____thestorekeeper‘sscissors，hewouldhaveforgottentobuyapair.
He‘sworkinghard_____.
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
Thegirlwhofoundtheringreceivedagenerous_____offivepounds.
