Two good friends, Sam and Jason, met with a car accident on their way home one night. The next morning, Sam woke up blind. His legs were broken. The doctor, Mr Lee was standing by his bed, looking at him with a thoughtful expression. When he saw Sam awake, he asked, “How are you feeling, Sam?” Sam smiled and said, “Not bad, Doctor. Thank you for doing the operation.” Mr Lee was moved by Sam. When he was leaving, Sam said, “Please don’t tell Jason about it.” “... OK.” Mr Lee replied.
Months later when Jason’s wounds (伤) healed, Sam was still very weak. Neither could he see or walk. What he could do was just stay in his wheelchair all day long. At first, Jason stayed with him for a few days. But days later, Jason felt very discouraged and embarrassed to spend time staying 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 other than Jason. He felt very sad.
Things went from bad to worse. Sam died a year later. When Jason came, Mr Lee gave a letter to him. It was 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. Tears ran down his face.
Why did Sam thanked the doctor?

A．Because the doctor was very friendly to him.

B．Because the doctor took good care of him.

C．Because the doctor saved his eyes.

D．Because the doctor kept the secret for him.

Which of the following happened according to the order of time?
a. Jason felt very discouraged to stay with Sam.                                        
b. Jason lost his eyes in an accident.
c. Sam donated his eyes to Jason.       
d. Jason didn’t go to visit Sam any more.
e. Sam died and Jason knew the truth.       

A．dacbe

B．dcbea

C．bcade

D．bcdae

The underlined word “healed” in the second paragraph is closest in the meaning to “__________”.

A．recovered

B．hurt

C．failed

D．disappeared

It can be inferred from the passage that Sam was__________.

A．kind-hearted and helpful

B．discouraged and outgoing

C．optimistic and humorous

D．enthusiastic and curious