超星 - Unit 7 Reading Exercise 2

单选题

From "The Story of Dan and Steve"Steve's brother, Dan, is a risk taker. Two years ago, he hiked through the Andes Mountains in Chile with only a backpack and a knife. Four years ago, he learned to scuba dive while on an adventure cruise in Alaska. Recently, he took up skydiving.Why did the writer say that Dan tried hiking, backpacking, scuba diving, and skydiving?

A. to give examples of Dan's risky behavior
B. to show that Dan is very athletic
C. to suggest that Dan likes to travel the world

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单选题

This devastating disease usually appears in middle age with symptoms of clumsiness and forgetfulness. Now Dan's dad is still able to work, but his handwriting has become uncontrollable, and it is difficult for him to sit for long periods without twitching.Why does the writer mention that Dan's father's handwriting has become uncontrollable and that it is difficult for him to sit for long periods without twitching?

A. to show that Dan's father is suffering from Huntington's disease
B. to suggest that life is not that bad for people with Huntington's disease
C. to create an image of the disease in the reader's mind

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单选题

When Dan finished school, he started to live the life of a risk taker. "What do I have to lose?" he thought. Steve, on the other hand, was happily married to Jessica. He elected not to have his genes tested but to continue to live the nearly perfect life he and Jessica had always enjoyed.Why did the author use the phrase "on the other hand"?

A. to show that Steve's other hand is fine
B. to contrast Dan and Steve
C. to explain why Steve didn't get his genes tested

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