Only three strategies are available for controlling cancer: prevention, screening and treatment. Lung cancer causes more deaths than any other types of cancer. A major cause of the disease is not (21) known; there is no (22) evidence that screening is much help; and treatment (23) in about 90 percent of all cases. At present, therefore, the main strategy must be (24) . This may not always be true, of course, as for some other types of cancer, research (25) the past few decades has suggested some importance in prevention, screening or treatment. (26) , however, we consider not what research may one day offer but what today’s knowledge could already deliver that is not being delivered, then the most practicable and cost-effective opportunities for (27) premature death from cancer, especially lung cancer, probably involve neither screening nor improved treatment, (28) prevention.
This conclusion do
A. widespread
B. affected
C. energetic
D. sensitive
Passage Three
Nine-year-old Louis Pasteur rushed into the little house, his face white.
"Mother!" he cried. "A mad dog has bitten my friend Henry, and now they are burning him with red-hot irons. It’s terrible!"
"Rabies(狂犬病), Louis. Burning the bites is the only hope of stopping Henry from catching the disease."
Henry did get rabies and died, in great pain, some days later. Louis Pasteur never forgot that. "One day," he thought, "I must do something to help people like Henry."
Sixteen years later Pasteur became a Doctor of Science. And he began making important discoveries in his special field.
Pasteur achieved great success in his life. But during the years of research he lost the use of his left arm and leg. Yet he worked on and on, as hard as ever, as he was eager to find a way for curing rabies. He never forgot his friend Henry.
After many dangerous experimen
A. Louis was famous for his discovery.
B. Though his left arm and leg were disabled, he worked even harder than before.
C. In his childhood he made up his mind to become a doctor.
D. His disabled(残疾的)left arm and leg had nothing to do with the mad dogs.
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