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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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BC中in less than 和since都是时间状语，不能有两个时间状语修饰
B since加ING的逻辑主语是后代，不合理
C中since后面是过去完成时，主句也是过去完成时，不合理
D it无指代
E 语意错误。原句有先后顺序，E搞成了并列
since releasing伴随状语--- 需要逻辑主语
it is december 2007; the world record in the discus throw has stood since 1986.
it was july 1991; the world record in the long jump had stood since 1968. --> but it was broken later that year
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。
BC.in less than……则是状语 since ……也是状语 不能有两个时间状语修饰
C，the+数字+名词表示那些就是全部数量，如：the three witnesses to a crime意思是总共只有3名罪犯。the 35 years since表示从……到现在就是35年，它对应的是现在式而不是过去式。
B：暗含releasing的主语是 honeybees' descendants，错误
C：since后面用had done错误
DE：It作形式主语出现无指代错误
牛逼了，上来就把正确答案排除了。。。大姐你这是要自己出题自己考么？
说了是错因了 而且做题时候有排除正确答案的情况不奇怪吧
不好意思，没看到前面错因二字登录 或 注册 后可以参加讨论
DE：It作形式主语出现无指代错误
B：in才是真正的时间状语引导词，since是对35 years的修饰，综合起来是说在releasing后的不到35年里，应该用一般过去时；同时，releasing无逻辑主语
C：in错误同B；同时less than+数字是一个泛指的数字，这个数字不能是特指，应该要不是“in the 35 years since..”要不是“in less than 35 years since”
D：it无指代，且连词when逻辑错误 E：it无指代，the特指错误，语句不通
choice b, since releasing African honeybees中，releasing的主语变成了their descendants. incorrect
choice d, when时间状语强调‘同时发生’，意思就变成‘释放鸟之后的35年’ 和‘后代移民到了得克萨斯南部’同时发生
choice e, 变成了并列句，也割裂了句子之间的联系。
如：3 years after my leaving Nanjing，the city had changed a lot.
b：releasing 主语变后面
c：in...状语 ， since...状语 。两状语 意思不对了。