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fornow

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

key: E
答案无异议。
请问这里是 have examined....and determined 平行
还是 have determined ...and (have) determined 平行

orange09

是have的省略~~

to do and (to) do
have done and (have) done
is doing and (is) doing

括号里面都是可以省略的内容~~

当N个to do并列时
如：to do, to do, to do, ..., to do.
如果第二个to省略那么后面的to全都要省略
如果第二个to没有省略 那么后面的都不省略
。。。。。

fornow

那什么情况下需要省略have呢？

chongyi

have examined... and (have) determined这里是助动词have的省略

Dianakisscat

我觉得应该是have determined ...and (have) determined 平行