Nobody can achieve anything of real significance _____ he works very hard.
As we know, every four years athletes from all over the world compete ____ medals in the Olympic Games.
I am fond of music while my sister likes reading novels. It seems that we have nothing ______.
is no doubt that the Great Wall is one of the wonders of the world.
— Whose Chinese vase is it?— I have no idea, but I’m pretty sure it _______ the old lady.
Mike ________ his car, for he came to work by bus this morning