二、从方框中选择合适的词,用其适当形式填空。
| invent discover find |
1.The camera ______ in 1887 by Joseph Nicephore Niepce.
2.Do you know who _____America?
3.Twenty years later,he_____ his younger brother.
| be used for be used as be used to used to |
4.This big room can _____ our laboratory.
5.The life here is much happier than it _______ be.
6.______you ________your English teacher's pronunciation?
7.Knives _____ cutting things.