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？

根据软件的功能和特点，计算机软件一般可分为_____。

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

下面________不是数据库系统必须提供的数据控制功能。

Which do you think is _________________important, health or wealth?

Either he or I ______to the airport.

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

Hurry up, or you ______ catch the train.

下面不能有效预防计算机病毒的做法是______。