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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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笔记：
C主要是时态问题，不能两个had been 明显俩动作有时间先后
since加个过去时态，release是个过去动作
B releasing的主语是后裔了
A主要是没说现在是哪年
前半句，放生之后的35年，应该还是个过去的时间。所以从现在的角度，没划线的地方是had migrated，那前面放生那里，肯定是一般过去时。也能看出来C妥妥错了
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