Ⅰ.根据词性及汉语意思写出单词

　　1．photography n．　　摄影术，摄影

　　2．focus n. 焦点，中心

　　3．flash n. 闪光，闪烁，闪光灯

　　4．customer n. 顾客

　　5．refrigerator n. (电)冰箱

　　6．practical adj.实际的，实践的→practically adv.实际上，事实上→practice n．& v．实践，练习→practise v．实践，练习

　　7．useless adj.无用的，无效的→useful(反义词)有用的→use n．& v．使用

　　8．wire n．金属丝，金属线→wired adj.装有线的，有线的→wireless adj.无线的

　　9．bath n．浴缸，洗澡→bathe v．给......洗澡

　　10．signal n．信号，暗号→sign n．符号，记号 v．签名，签订→signature n．签名，署名

　　Ⅱ.用所给词的适当形式填空

　　11．We enjoy freedom in such a free atmosphere.(freedom)

　　12．This is an automatic gate.It will open automatically when you go through it.(automatic)

　　13．During the break, the schoolyard is noisy,_for many children are making noises.(noisy)

　　14．The book has been translated into several foreign languages, whose translator is a famous Chinese writer.(translate)

　　15．The person who is in charge of electricity is called electricians.(electric)

　　Ⅲ.补全短语

　　1．according to　　根据，按照

　　2．go through 穿过，通过

　　3．put on 穿上

　　4．worry about 为......担心(不安，烦恼，焦虑)

5．be made from 由......制成