If you show you ____ ____ ____ (意识到) cultural differences, most Americans will not worry about answering your questions.
受地形地势的影响，亚洲河流流向的特点是（ ）
计算：- (-2ax2)2-4ax3·(ax-1)=____．
Look! The panda is so ____. It's _____ than both of us.
