（2014年安徽省合肥市高三第三次教学质量检测）31. What the whole nation cares about most at present is ______ the rescue teams could find the missing plane.

There have been cases         some English learners can’t get their message across even though they have memorized a lot of words.

All the economists are working on　　　the financial crisis can be prevented, which has caused a huge loss throughout the world. 

I can judge which part of China you come from         you open your mouth.

On arriving home, she was surprised to find that the kitchen was filled with _______ smelled liked tasty dishes.