0. The biggest difficulty in operating on the damaged brain is that____ ．

　　A．the time is too short for doctors

　　B．the patients are often too nervous

　　C．the damage is extremely hard to fix

　　D．the blood-cooling machine might break down

　　1. The brain operation was made possible mainly by____ ．

　　A．taking the blood out of the brain

　　B．trying the operation on monkeys first

　　C．having the blood go through a machine D．lowering the brain’s temperature

　　2. With Dr. White’s new idea, the operation on the damaged brain____ ．

　　A．can last as long as 30 minutes

　　B．can keep the brain’s blood warm

　　C．can keep the patient’s brain healthy D．can help monkeys do different jobs

　　3. What is the right order of the steps in the operation?

　　a．send the cooled blood back to the brain b．stop the blood to the brain

　　c．have the blood cooled down

　　d．operate on the brain

　　A．a,b,c,d B．c,a,b,d C．c,b,d,a D．b,c,d,a

　　C

　　Kites have been around for a long time.The Chinese invented kites over 2000 years ago. A determined man named Mo Zi had an idea as he watched hawks(鹰) fly. He spent three years making a wooden hawk“kite”. It broke after one flight! Mo Zi and his Chinese friends did not give up. Soon they perfected the art of creating kites.

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