1．He gave a ________ (信号) to the driver to carry on.
2．His father is a baseball ________ (教练)．
3．My father bought an ________ (电子的) dictionary for me.
4．Generosity is part of the American ________ (性格)．
5．This is a new __________ (类型) of machine, with lots of meters on it.
6．My ________ (侄女) is very lovely.
7．We should watch out for the computer ________ (病毒)．
8．More problems like those at the nuclear power plant are certain to ________ (出现)．
9．Judging a person by his ________ (外貌) is wrong.
10．When you ________ (下载) something, you must be careful about viruses.
