Around the world, people have different ideas about what good manners are.

When you go to restaurants in different parts of the world, it’s ________ to know what the right and wrong things are. For example, in China it’s OK to ________ lots of noise in a restaurant. In fact, if a restaurant isn’t noisy and ________, you may think there’s something wrong with it. However, in many western countries, restaurants are ________ places. If a table is too loud, other people who are eating there might even ________ to the owner of the restaurant.

Paying the bill is also different from country to country. In China, one person usually pays for ________. In western countries, one person pays if he or she is entertaining clients（请客）, but ________ friends eat together, they usually share the cost. This is called “going Dutch（AA制）”. Also, when the westerners pay the bill, they usually leave some money for the ________. This is called “leaving a tip（付小费）”. Leaving a tip is thought to be polite. In the USA, it’s ________ to leave tips of 10%, 15% or 20% of the bill, which is decided by how good the service is. Good waiters（or waitresses）can make a lot of money! .

The way people eat food is different in the world, but you can ________ the same kind of food in many countries. Chinese and Italian foods, for example, are popular all over the world.

At midnight, Mr. King coughed again. He got up and took some medicine. Before he lay down again, he smoked. And he couldn’t go to sleep any longer. He found the medicine book and began to read it. He was afraid that he had lung cancer. He seemed to see that death was waiting for him. Tears ran down his face. He didn’t know that his wife was standing by him.

“What’s wrong with you, dear?” asked the woman.

“Nothing.” the old man answered and covered his face with his hands.

The old woman opened the book and understood at once. She said, “You must stop smoking right now.”

“I began to smoke when I was nine, you know. How can’t I do that?”

“But I think that health is more important.”

Mr. King coughed again and his wife said, “Go to see a doctor tomorrow. He will be able to help you, I think.”

The doctor told Mr. King to have an X-ray examination of his lungs. And then he looked at the X-ray carefully for a long time.

“Tell me the truth, doctor,” said Mr. King. “Do you see any shadows（阴影）in my lungs?”

“No, I don’t see anything.”

“Yes?” the old man said happily. “Really?”

“Yes. Your lungs are turning black. How can I see any shadows?”