题目内容：

    Former National Football League player and children’s author Tim Green has added another book to his list of accomplishments: Unstoppable. The book tells the story of a 12 year-old boy named Harrison, who survives life in a cruel lobster-home（寄养家庭）before he finally finds a loving family. Then he settles in and realizes his natural football ability but he loses his leg due to a deadly bone cancer. Unstoppable follows Harrison’s difficult life journey.

Tim Green said he decided to write a novel about a kid facing cancer after watching how his wife fought to survive her own illness. “Her mental and physical toughness were more heroic to me than anything I’d ever seen in the national sports leagues,” Green told TFK.

Green said, he knew he needed to write about a person who struggled through a serious illness. But because the target age for his books is the teen, he needed to tell the story through the eyes of someone of that age. He needed a perfect real story on which to base his book.

When friends introduced Green to Jeffrey Keith, Green knew he had found the right person to help him “capture（捕捉）the heroism that it takes to fight cancer”, Cancer- survivor Jeffrey Keith lost his leg at the age of twelve, but went on to be the goalkeeper and was also the first amputee（被截肢者）to run 3,300 miles across the country.

TFK asked Keith what it felt like to read Unstoppable for the first time. “Tim captured what it felt like for me to go through this experience and battle back, “Keith said.” Tim’s look sends a message to all the kids across the country that are facing challenges and that have nothing to do with cancer; you are all unstoppable, as long as you believe it.”

1.What does paragraph I mainly intend to say about Harrisons life？

A.It is poor but colorful. B.It is full of challenges.

C.It is filled with chances. D.It is peaceful but boring.

2.Why did Tim Green want to write Unstoppable？

A.He was impressed by Harrison’s encouraging life.

B.He intended to make Jeffrey Keith’s story well known.

C.He was inspired by his wife’s struggle with her illness.

D.He wished to encourage adults to light against illness bravely.

3.In what way did Jeffrey Keith play a role in Unstoppable?

A.It is based on his life experiences.

B.It is written by him and Tim Green.

C.He offered great advice to its author.

D.He has introduced it to many people.

4.What’s Jeffrey Keith’s attitude to Unstoppable？

A.Worried. B.Cautious.

C.Uncertain. D.Favorable.