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

2I didn’t know whether to ____ her silence as acceptance or refusal

If a boy or a girl has grown up in a home with sharing tasks and decisions，he or she will probably______.

______ it or not , his discovery has created a stir in scientific circles.

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

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

Don’t ______ that rope, or you might fall.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

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

In speed reading, looking at your watch every 5 or 10 minutes ______.

表达式(8+3＞36.OR..T..AND.“A”-“B”$“ABC”)的运算顺序是______。