Sam and Bill are brothers. But Sam is _than Bill.

--What do you think of Lady Gaga?--Maybe she is one of ________ singers in the world.

I think watching TV every evening is a waste of time. There are _________ meaningful things to do.

------Which do you prefer to live in, the city or the countryside? ------Of course in the countryside. The air is much _________.

—Which season do you like _________，winter or summer?—Summer.