Taking this kind of medicine,if ________,will possibly do hi
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答案B

continue此处用作及物动词,接在if后面,因为与逻辑主语是被动关系,所以要用过去分词,if continued相当于if it is continued,因为从句的主语it代替的就是主句中的主语Taking this kind of medicine,而且从句中有系动词,这种情况下,可把it is省去,构成省略形式.