[讨论]大全987无重复142题， 关于快速解题的方法 。

1.        As U.S. nuclear attack submarines prowl their familiar haunts deep within the oceans of the world these days, they increasingly are engaged in missions far different from the tasks for which they were built and for which their crews were trained over the last forty years.

(A) they increasingly are engaged in missions far different from the tasks for which they were built

(B) the missions they increasingly engage in are far different than the tasks they were built for

(C) they engage increasingly in missions that differ significantly from the tasks they were built for

(D) the missions they engage in are increasingly different than the tasks for which they were built（A）

(E) they increasingly engage in missions far different than the tasks for which they were built

这道题在大全注释中提到了different from 和different than 的区别，认为different than 后面应该接句子以此认为different from 更好，从而排除BDE。但是我认为根据做题的规律上来看此题只需要看哪个答案保留了原文当中被动的意思即可。因为sb. engage in sth和sb be engaged in sth. 都可以，这样就可以直接排除后四个选项了，不知道这样理解可不可以？

选项A increasingly放在are之前怎么那么别扭,应该直接放在它的修饰对象engaged之前吧

我觉得5个选项都不好...