According to the passage, lung cancer ______. The cure for lung cancer ______.

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问题 According to the passage, lung cancer ______.
The cure for lung cancer ______.

选项 A、can be found before long
B、is available if one needs it
C、is unknown at present
D、will be found before you need it

答案C

解析 倒数第二段最后一句:应该注意选项a中的before long的意思是不久以后,和原文意思相反
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