题目内容：

    At the age of 14, James Harrison had a major chest operation and he required 13 units (3.4 gallons) of blood afterwards. The blood donations saved his life, and he decided that once he turned 18, he would begin donating blood as regularly as he could.

More than 60 years and almost 1,200 donations later, Harrison, whose blood contains an antibody (抗体) that has saved the lives of 2.4 million babies from miscarriages (流产), retired as a blood donor on May 11. Harrison’s blood is valuable because he naturally produces Rh-negative blood, which contains Rh-positive antibodies. His blood has been used to create anti-D in Australia since 1967.

“Every bottle of anti-D ever made in Australia has James in it,” Robyn Barlow, the Rh program director told the Sydney Morning Herald. “It’s an amazing thing. He has saved millions of babies. I cry just thinking about it.” Since then, Harrison has donated between 500 and 800 milliliters of blood almost every week. “I’d keep going if they let me,” Harrison told the Herald. His doctors said it was time to stop the donations. They had already extended the age limit for blood donations for him, and they’re cutting him off now to protect his health.

Harrison’s retirement is a blow to the Rh treatment program in Australia. Only 160 donors support the program, and finding new donors has proven to be difficult. But Harrison’s retirement from giving blood doesn’t mean he’s completely out of the game. Scientists are collecting and cataloging his DNA to create a library of antibodies and white blood cells that could be the future of the anti-D program in Australia.

1.Why did James Harrison decide to donate blood as regularly as he could?

A.Because he wanted to be a celebrity.

B.Because he was saved by the blood donations when he was young.

C.Because his blood is valuable.

D.Because the Rh treatment program in Australia need him.

2.What can we learn from the underlined sentence in paragraph 3?

A.Robyn Barlow was sad because millions of babies suffer from blood disease.

B.Robyn Barlow was worried because Harrison may die of losing too much blood.

C.Robyn Barlow was moved by Harrison’s donations.

D.Robyn Barlow was frightened by Harrison’s crazy behavior.

3.What can we infer from the last paragraph?

A.Harrison’s retirement will not affect the Rh program.

B.After Harrison’s retirement, the Rh program will fail.

C.Harrison’s influence to the Rh program will still exist after his retirement.

D.A library has been built for the study of Harrison’s DNA .

4.Which word can best describe Harrison?

A.Patient. B.Diligent.

C.Talented. D.Devoted.