The young woman became critically ill and was sent to the big city,where specialists can b

The young woman became critically ill and was sent to the big city,where specialists can be called to study the disease.
A. up , general
B. in, rare
C. on , serious
D. for , important

A. up , general(答案→)B. in, rareC. on , seriousD. for , important解析：考查短语辨析和形容词的区别。句意“那个年轻的女士病情加重，被送往了大城市，在那里，专家可以被召集起来，一起研究这种罕见的疾病。”call up“打电话，回忆起，应征入伍”；call in“召集，收回”；call on“号召，请求，拜访”；call for“需要”。general“总的”；rare“罕见的”；serious“严重的”；important“重要的”。故选B。

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