The goal, which they are unlikely to live to see , is tocure, prevent or manage all diseasesin the next 80or so years.
本题考查非谓语动词。句意为“这个目标是在接下来大约80年的时间里治疗、预防或控制所有的疾病,尽管在他们有生之年不大可能看到目标实现”。由于accomplish和goal是被动关系,所以空格处需填过去分词作宾语补足语,可排除B、C。see sth.being done强调看到的事情正在发生,与句意不符,这句话可还原为“they are unlikely to live to see the goal accomplished”。故本题选A。
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