31. I want to know how the money was used ______ and whether it is used in a reasonable way or not.

_______ is the hospital— About twenty minutes’ walk.

He is good at maths and it won’t be long ____ he works out the problem

___.— Yes. Two minutes earlier, we could havecaught the bus.

With the launch of the Shenzhou VII spaceship last week, more and more Chinese people __________ of one day living on the moon