用preposition
1. _____ my surprise,this essay was written by a boy of eight.
2. What is this kind of chair made ____?
3.What is this kind of bread made ____ ?
4.Do you see the gril _____ red ? She is our monitor.
5._____ the way,can we do these exercises at home?
6.A war was fought _____ the two countries _______ about ten years, and thousand _____ people were killed.
7. If Tom isn't here ____ seven o'clock, we'll go____ him.We don't want to be late in the concert.