The reason for making a decision is that a problem exists, or something is standing ______the way of accomplishing them.

In ______, the only element that can be deleted or removed is the one that was inserted most recently.

Either you or one of your students ______ to attend the meeting that is due tomorrow.

It is reported that the police will soon ______ the case of the two missing children.

It is reported that some scientists in the United States have found a new _____ for cancer.

It is reported that the American Medical Association has called for the sport of Boxing______.

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.

It is reported that the _______of the country. from hotels to transport, is oldand decrepit.

It is reported that many a new house_______ at present in the disaster area in Gansu province.

It is the ability to do the job ______ matters not where you graduate from or what you are.

By saying “While it’s true that ..., be they scientific or artistic” (Lines 1-3, Para.5), the author means that _____.