【简答题】We can see walls everywhere in the world. But the Great Wall of China is the biggest of all. The Chinese call it. “The Ten-thousand-Li. Great Wall.” It’s in fact (事实) more than 6,000 kilometers long. ...
【简答题】Do you know Australia? Australia is the largest island in the world. It is a little smaller than China. It is in the south of the earth. Australia is big, but its population is not large. The populati...