Lucy is ________ of the two.

Peter is ________of the three boys, but he’s _______than the other two.

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

Lanzhou is the only capital city that the Yellow River, the second ________ river in China, passes through.。

---I eat _____ vegetables and ______ meat than I did last year.  ----That's why you're getting fatter.