All people, whether they be rich or poor, strong or weak, privileged or deprived，are interdependent, and _______ the common task of seeking to achieve mankinds full potential

Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

Which do you think is ________, health or wealth？

技术的发展经历了三个大的发展阶段,即以_____为基础的技术体系;以机械和电气技术为基础的技术体系和当代蓬勃发展的以_______为基础的技术体系。

所有电流互感器和电压互感器的二次绕组应有一点且仅有一点_____、可靠的_____。

29．__________ when you are on the bus or bike．

一Whom would you like to be your assistant，Jack or David？ 一If I had to choose，David would be__________choice.

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

国防工程、安居工程、民生工程等公共服务分类是按___分类的。

技术的发展经历了三个大的发展阶段,即以_____为基础的技术体系;以机械和电气技术为基础的技术体系和当代蓬勃发展的以_______为基础的技术体系。

互感器一、二次绕组的同极性端子标记通用_________为同极性,_________为同极性。