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The special medicine for the disease was difficult to find t

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The special medicine for the disease was difficult to find though ____everywhere A sought B have so
The special medicine for the disease was difficult to find though ____everywhere
A sought B have sought C being sought D having been sought 请帮我详解!
答案:A
解析:though 引导让步状语从句,如果和主句主语一致,或者当though后的主语是【it+be动词】的形式,则可以省略【主语】或者【it+be动词】.
though这里是连词 尽管的意思,后面需要接从句.这个句子的主语是The special medicine ,应该使用单数形式,而且需要使用被动语态.B have 用的是复数形式,且没有用被动语态.
而CD是非谓语动词形式,都是现在分词,不能做谓语,前面已经说过这里是句子,要有谓语动词,所以排除CD
选择A原因:前面说到省略了主语的形式,下面补全:
The special medicine for the disease was difficult to find though【 it was sought】everywhere.句子使用了被动语态,省略了【it was】
翻译:针对这种疾病的特殊药物很难找到,尽管已经到处寻找了.
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