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

I make notes in the back of my diary _________ thing to be mended or replaced

1_____education is the instruction that occurs when the instructor and students are separated by distance or time,or both

The United States is composed of fifty states,______ are separated from the others by land or water

The kids are _______ be hungry when they get home [

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

Parents are encouraged to be role models for their kids because______.

Data items are added or deleted from the list only at the top of the______．

Dreams are often an elegant means of highlighting problems ______ in the present or the past.

Dreams are often an elegant means of highlighting problems________  in the present or the past．

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

______no air or water, there would be no life in the world.