a divided-back post card. Then people could write their note on the back left side and put the address on the right. During the early 1900s, the golden age of post cards, picture post cards became a craze of the world. In 1908, Americans alone mailed over 677 million post cards. Today, post cards are the third most popular collection in the world after stamps and coins.

（ ）41. We can see some silly pictures on the post cards.

（ ）42. Post cards were produced before sealed letters.

（ ）43. In 1861, the first decorated post card appeared.

（ ）44. Post cards were most popular during the early 1900s.

（ ）45. Stamps, coins and post cards are the most popular collections in the world.

(A)

At midnight (半夜) 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 he had lung cancer(肺癌). He seemed to see death was waiting for him. Tears (眼泪)ran down his face. He didn't see 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 I do that?"

　　"But I think 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（X光检查）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?"

46. Mr. King got up to .

A. smoke again B. take some medicine C. read the medicine book.

47. Mr. King coughed because .

A. he couldn't go to sleep B. he was afraid to die C. he smoked too much

48. , so tears ran down his face.

A. Mr. King thought he had lung cancer

B. Mr. King couldn't understand the book

C. Mr. King was too sad to go to sleep

49. The doctor told Mr. King to have an X-ray examination because .