Researchers have found no evidence so far that spider webs can kill germs.But studies on animals have shown that spider silk helps prevent the rejection of medical implants(移植)．So Lewis’ lab and others’ are changing spider silk into fibres that they hope might be useful in medicine.

　　Researchers have found that spider webs could be used to rebuild ligaments damaged in one of the world’s most common knee injuries.“We’re also looking at spider silk in

　　artificial tendons(腱)，”Lewis said.

　　Scientists are also developing spider silk to be used for stitching up(缝合)wounds，to help them heal without scarring.

　　1．The belief that spider silk is useful for rebuilding injured ligaments is based on the idea that____________________________________________________________________.

　　A．it has cured Yao Ming and O’Neal’s wounds

　　B．it’s the strongest natural fibre in the world

　　C．it has long been used to cure the injured

　　D．spider silk can be used for stitching up wounds

　　解析：根据第二段得知蜘蛛丝可以用来修复受伤的韧带，是因为它被认为是地球上最结实的天然纤维。

　　答案：B

　　2．We can learn from the passage that________.

　　A．it has been proved that spider webs can surely kill germs

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