很重要的题!大家来看看帮忙解释下~!对自己也有帮助

45. (26929-!-item-!-188;#058&003015)

（The application of a new method for analyzing the chemistry of tooth enamel allows scientists to
examine molars of prehuman ancestors and determining） that their diets were more varied than had
been supposed.

(A) The application of a new method for analyzing the chemistry of tooth enamel allows scientists to
examine molars of prehuman ancestors and determining
(B) Through the application of a new method for analyzing the chemistry of tooth enamel, the
molars of prehuman ancestors were examined by scientists who determined
(C) When they applied a new method for analyzing the chemistry of tooth enamel, scientists
examined molars of prehuman ancestors, determining
(D) Applying a new method for analyzing the chemistry of tooth enamel, the molars of prehuman
ancestors have been examined by scientists, who determined
(E) Applying a new method for analyzing the chemistry of tooth enamel, scientists have examined
molars of prehuman ancestors and determined
答案是e选项,我想问一下,b选项不存在逻辑主语不恰当的问题吧! 因为 application 是名词,不存在前后主语不一致的问题吧? 还有e选项的时态有问题吧! 伴随状语表示同时发生,主句又是完成时,不太恰当吧!我还想问一下,determined前面的have 是不是省略了?

关于时态我是这样理解的：首先未划线部分中时态正确，suppose先发生，用had。然后划线部分是说通过使用新技术，科学家化验并作出结论。。。，这个动作一定发生在被研究内容发生的动作之后，即their diets were more varied
所以三个动作体现时间先后，说得通
而且个人感觉好像很少有题可以准确用时态作判断，还是纠其他的错比较保险