Nine﹣year﹣old Louis Pasteur rushed into the little house，with his face white．

"Mother!"he cried，"A mad dog has （31）　　my friend Henry，and now they are burning him with red﹣bot irons （烙铁）．It's terrible!"

"Rabies （狂犬病），Louis，Burning the bites is the only （32）　　of stopping Henry from catching the disease．"

Henry did get rabies and died，in great （33）　　，some days later．Louis Pasteur never （34）　_　"One day，"he thought，"I must do something to help people like Henry．"

Sixteen years later Pasteur became a Doctor of （35）　　．And he began his work in t his special field．Pasteur achieved great success in his life．（36）　　the years of research he lost the use of his left arm and leg，yet he never lost heart．He worked on and on，as hard as ever，（37）　　he had a strong will to find a way for curing rabies．

After many dangerous experiments on mad dogs，he （38）　　found the answer．Just then a boy who had been badly bitten by a mad dog arrived at his lab．A few days after Pasteur's treatment the boy got（39）　　．He did not catch rabies．

The discovery gave new hope to people in many countries．People sent money to help （40）　_　the Pasteur Institute in Paris．Today it is one of the world's most famous centers for research．

31．A．knocked	B．pulled	C．kicked	D．bitten
32．A．result	B．hope	C．truth	D．value
33．A．pain	B．trouble	C．sadness	D．danger
34．A．forgot	B．refused	C．continued	D．remembered
35．A．French	B．Law	C．History	D．Science
36．A．From	B．Before	C．During	D．Until
37．A．when	B．though	C．if	D．as
38．A．hardly	B．fanally	C．even	D．again
39．A．easier	B．harder	C．better	D．worse
40．A．build	B．close	C．buy	D．repair