— $10 each kg. It is so expensive that ________ of us can buy them.

A

      There are too many cities around the world. And each city needs water in many ways. Water on Earth falls mainly as rain. So the rainfall (降雨量) is important to each part of the world. And it is different from one city to another. The following chart shows the average (平均的) rain fall in four different cities in July and January.

 B

      Bill sells Coca-Cola all over the world. Last week, he returned from the Middle East.   

       A friend asked, "How was your business with the Arabs?" "Too bad," Bill said in a sad voice. Then he explained, "When I got to the Middle East, I was very confident that I would have a good sale as Coca-Cola is well known around the world. However, I had a problem - I don't know how to speak Arabic. So I made some nice posters to help sell Coca-Cola. There are three pictures in each poster. In the first picture, a man is crawling (爬行) through ahot desert sand. He is terribly tired and thirsty. In the second one, the man is drinking our Coca-Cola with a big mouth. In the third one, he is smiling happily. Soon such posters were seen."

      "That's a good idea," said the friend. "Well, it should," Bill answered. "But I didn't know that Arabs usually read from right to left."