When a dog is barking, you assume it is barking for something or at someone that exists hear and now It couldn’t be sorrowful for some lost love or lost bone This indicates the design feature of __________

The question ________ he should confess it or not troubled him greatly ( )

_______ it will do us harm or good remains to be seen

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

If the product does absorb moisture or ________ water, discard it

______ 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.

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．

It is generally considered unwise to give a child___( )_____ he or she wants.

 ______ 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.

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

I think you should end it ______ it is too late, or you will be sorry for it.