下列虚词用法相同的一组是（ ）

_______ do you prefer, walking or running—I like running better.

You may _____he will come here to give us a hand. [ ]

the big crowd coming towards him, he started to run down the hill, but ______ and went down on his hands and knees in the melting snow.

My sister is four. My ______ brother isfive years ______ than I. He is ______ of us three.