Last year was the 100th anniversary （紀(jì)念日） of the discovery of insulin （胰島素）.Before 1921，children and adults with diabetes （糖尿病） most often died within a few days or months.Insulin can make this timeline last for more years.
   Back in the 16th century，there were records about this"terrible disease" .People got much pain from sickness，too much thirst and so on，and soon died in pain.These were all caused by high levels of blood sugar.For thousands of years，humans didn't know how to deal with it.This changed in the 1880s.That's when scientists found a special thing named insulin.It controls blood sugar.But scientists didn't know how to get it.
   In 1921，F(xiàn)rederick Banting came up with an idea.The Canadian doctor asked his friend to provide him with a lab，and worked tirelessly on 10 dogs.Soon after，he successfully took out insulin from a dog and used it to treat another dog with diabetes.To his surprise，the insulin made its blood sugar levels go back to normal.Later，Banting and Scottish scientist John Macleod made a more purified （提純的） form of insulin.They used it to successfully treat a 14-year-old boy who was dying from diabetes.
   In 1923，Banting and Macleod received the Nobel Prize in Physiology or Medicine.To help people get the medicine easily，they sold the patent （專利） for just one dollar.As Banting said， "Insulin belongs to the world，not to me."
   Today，there are more than 400 million people with diabetes around the world.Insulin gives them a fighting chance to live.

根據(jù)材料內(nèi)容選擇最佳答案。
（1）With the insulin，diabetes patients

C

C

.
A．can keep away from diabetes
B．may find other diseases soon
C．can avoid dying in a short time
D．may experience great pain every day
（2）What are the symptoms （癥狀） of diabetes？

C

C

a.Sickness.b.Feeling cold.c.Very thirsty.d.Too much hunger.
A．a(chǎn)b
B．bd
C．a(chǎn)c
D．a(chǎn)d
（3）Why wasn't insulin used on patients in the 1880s？

B

B

A．Because it failed in animal tests.
B．Because there was no way to get it.
C．Because no one paid attention to diabetes.
D．Because people didn't trust the new treatment.
（4）What do we know from Paragraph 3？

C

C

A．Why insulin could help treat diabetes.
B．How much scientists got from insulin.
C．How scientists got insulin for treating patients.
D．What failures scientists experienced while studying insulin.
（5）Why did Banting and Macleod sell their patent for one dollar？

B

B

A．Because they wanted to get the Nobel Prize.
B．Because they wanted to help more diabetes patients.
C．Because their findings were based on others' research.
D．Because insulin was too expensive to afford for patients.