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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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考点为时态；一前一后发生，后者是完成时，那么前者应该是过去时。B中since releasing的主语是他们的后代，逻辑语义错误；C的when表明二者同时发生，错误； The 35 years 表明距离现在35年，而距离现在多少年是未知的，题目只说明这两个事件之间的距离是35年。排除CE
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