prep-1-3

3.    (24557-!-item-!-188;#058&001027)

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.

(A) Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,

(B) In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,

(C) In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,

(D) It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when

(E) It took less than the 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then

 答案A~~ 完全不明白.....

 希望NN帮我分析一下

 我只知道：D主句分局颠倒了... E时态有问题 过去 AND THEN 过去完成时

 其他错误就看不出来了....

 总觉得有完成时 就应该有SINCE 就猜了个带SINCE的 .... 然后 就错了...

B): releasing 的动作没有发出者,因此还是选抽象名词the release好;

C):用完成时：“have/had done…since did”，没见过have/had done…since have/had been done 的结构出现过.

C):用完成时：“have/had done…since did”，没见过have/had done…since have/had been done 的结构出现过.

楼上说的对

  这题我把一个前辈NN的解释贴出来, 给大家参考:

Since  必须使用现在完成时,

In +时间段(in one year) 使用将来时

In the last few years 实用完成时

it 是形式主语, 后面必须有真正的主语出现... D, E 中it  不能指代 release

it seems  ( be adi/adv) + that

我也来讲讲，我先排除了DE,it做形式主语后面只能有两种形式that从句或to do的不定式，这里什么也没有--〉错；

ABC中since 和 after 都可以用完成时since是肯定完成时，after是一般过去或过完都可以。

the 35 years 不对，Less than XX years, 强调的是XXyears这个时间跨度而不管是在哪几个年份，不应用定冠词，如果是the last XX years强调的是过去的这XXyears就需要the，--〉排除C

然后比较AB两句 Less than 35 years 读上去更顺，但是自己不是NN不能相信语感，再看 the release 和 releasing, 新东方老师讲过一个动词如果本身有名词形式，不管是抽象名词还是本身就可以做名词，那就应该尽量用名词而不要用动名词表达，再说the，这个release确实应该是有特指的某一个事件，从那次之后，--〉各方印证A啦

欢迎大家拍砖啦

我也来学习看看~~