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题库 / Prep2007E1-SC-3
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as southern Texas.
Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,
In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,
In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,
It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when
It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then
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句首状语与句子有合理的逻辑关系，语法正确，所以原句没有问题。
选项B和C：since用法使用错误，since是现在完成时的时间标志词，不能与过去完成时搭配。
选项D和E: it做形式主语，没有指代；并且E选项after the time that 表达复杂。
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