A．Because it is based on real stories.B．Because i

Why is it warmer on the side of a hill than on the valley floor？A．Because warmer air lifts

Barack Obama is urging to extend a payroll tax cut because it______.A．is set to expire on

Because of its geographical position, Germanys______on the situation in Eastern Europe is

I doubt_____he is the murderer because he is not on the scene at that moment.A．whyB．thatC．

Some people may disagree with the author on his method because they thinkA．it is not pract

______ I prefer shopping online because it is more convenient and saves time and money.A．I