任务型阅读。 阅读下列材料，从所给的五个句子中，选出正确的句子填空，把所选句子抄写在原文当中， 使短文通顺，完整。 A rich American went into a shop in London. He wanted to buy a nice watch. 1._____ But the shop owner asked 500 dollars for it. Just then a young man came in, took the watch out of the owner's hand and run out with it. 2._____ . When the owner ran out into the street, the young man was already gone. The American went on. At the next corner, 3._____ 'Do you want to buy a fine watch,sir?' he said in a low voice,' It's made in Germany. It's only 100 dollars. '4._____ ', he thought. The American paid at once and went back to his room with the watch. 5._____ . His friend took a look at his watch and started to laugh. He said, you are a fool. This watch isn't worth even 10 dollars. It all happened in a minute. He was happy and told his friend about the fine watch. He saw a watch and he liked it. He saw the young man with that watch in his hand. The young man didn't know I saw what happened in the shop just now.