完形填空

　A pine tree in California was regarded （看作）the oldest tree in the world. People thought 　1　 was nearly 5,000 years old. 　2　　 　they could not be 　3　　 　. Then someone 　4　 the tree down 　5　　 　a chain saw （链式锯）。Kiling the 　6　　 　tree in the world was a 　7　　 　thing to do. But when the tree 　8　　 　down, 　9　　 　knew its 　10　　 　. It was 4,900 　11　　 　.

　How can you 　12　　 　the age of a tree? If you ever 　13　　 　a tree that has just 　14　　 　cut down, take a look at the cut 　15　　 　. You will see rings. There are little rings in the middle. 　16　　 　each ring is a larger one. The ring 　17　　 　the bark （树皮）is the biggest one of 　18　　 　.

　Count these rings. A tree grows one ring each 　19　　 　. A ten-year-old tree has ten rings. A sixty-year-old tree has sixty rings. 　20　　 　rings does a 4,900-year-old tree have?

Two good friends, Sam and Jason, met with a car accident on their way home one snowy night. The next morning, Sam woke up blind. His legs were broken. The doctor, Mr Lee, was standing by his bed, looking at him worriedly. When he saw Sam awake, he asked, “How are you feeling, Sam?” Sam smiled and said, “Not bad, Doctor. Thank you very much for doing the special operation(手术).” Mr Lee was moved by Sam. When he was leaving, Sam said, “Please don’t tell Jason about it.” “Well…Well…OK,” Mr Lee replied.

Months later when Jason’s wounds healed(愈合), Sam was still very sick. He couldn’t see or walk. He could do nothing but stay in his wheelchair all day long. At first, Jason stayed with him for a few days. But days later, Jason thought it boring to spend time with a disabled man like Sam. So he went to see Sam less and less. He made new friends. From then on, he didn’t go to visit Sam any more. Sam didn’t have any family or friends except Jason. He felt very sad.

Things went from bad to worse. Sam died a year later. When Jason came, Mr Lee gave him a letter from Sam. In the letter Sam said, “Dear Jason, I am disabled. But I want you to be a healthy man. So I gave my eyes to you so that you can enjoy life as a healthy man. Now you have new friends. I’m glad to see that you are as healthy and happy as usual. I’m glad you live a happy life. You are always my best friend... Sam”. When he finished reading the letter, Mr Lee said, “I have promised that I will keep this a secret until Sam is gone. Now you know it.”

Jason stood there like a stone. Tears ran down his face.

46. The car accident happened ____________.

A. only to Sam　　 B. on a cold evening　　 C. the next morning D. on the way to work

47. Sam thanked Mr Lee mainly because Mr Lee　　　　　　 .

A. saved his friend Jason’s life

B. was very kind and friendly to him

C. came to see him early in the morning

D. did the operation according to his wish

48. Which of the following is the correct order of events in the story?

a. Jason made new friends.　　　　　　　　　　　　　　　

b. Sam gave his eyes to Jason.

c. Sam and Jason met with a car accident.　　　　　

d. Jason felt bored when staying with Sam.

e. Sam died and Jason knew the truth.

A. c--b--d--a--e　 B. d--c-- b--e--a　 　　 　　 C. d--a--c--b--e　 D. c--d-- b--e—a

49. After we finish reading Sam’s letter, we can infer(推断) that ___________.

A. Sam caused the car accident　　　 　　　　　　　　　　　　

B. Sam’s operation was not successful

C. Jason was made blind in the car accident

D. Jason knew how Sam helped him before Sam died

50. From the story, we can conclude(得出结论) that __________.

A. Sam played a joke on Jason 　　　　　

B. Sam always told lies to his friends

C. Sam thought friendship was important 　　　　

D. Sam regretted doing the operation in the end