Dr. Tonegawa won the Nobel Prize for discovering how the body can constantly change its genes to fashion a seeming unlimited number of antibodies, each specifically targeted at an invading microbe or foreign substance.
seeming unlimited number of antibodies, each specifically targeted at
seeming unlimited number of antibodies, each targeted specifically to
seeming unlimited number of antibodies, all specifically targeted at
seemingly unlimited number of antibodies, all of them targeted specifically to
seemingly unlimited number of antibodies, each targeted specifically at
笔记:我觉得D中,比起them的指代问题,target用的介词应该是at不是to,并且them和specifically不对应;而E答案用each和specifically搭是对应的,并且target的介词用了正确的at
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