No.115 GWD11-26:

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

A.       On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow

B.       On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth

C.       On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles

D.       Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate

E.       Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow  

a主谓不一致

b wordy加主谓不一致

然后我选了e

谁来给我解释一下后三个选项

谢谢

答案应该是E

D选项没有谓语动词,首先排除

C和E的主要问题点我认为是on earth状语的位置

我总结的一点,修饰语要紧靠修饰对象

c中on earth置于句首,只能修饰整个句子,所以不清楚On earth的具体修饰对象是什么

E中one earth紧接indications,修饰indications,修饰关系清晰

答案应该是E

A,B主谓不一致，且B中“it is believe”纯属wordy，“the rate of tree growth”逻辑错误

D选项无谓语动词

C错在Logical prediction，“as seen in the rings”修饰的对象必须是前面紧挨着的短语或结构，在C中“indications of

sunspot cycles”可以“as seen in the rings”，而实际上只有“the rate at which trees grow ”才可以“as seen in the

rings”。

关于“on Earth”，我觉得在“http://www.manhattangmat.com/forums/on-earth-among-the-surest-indications-of-sunspot-

cycles-are-t1833.html”中解释的很好，现摘录给大家：
“the placement of 'on earth' is also much better in e than in a.
- e says what it's supposed to say: we're looking at indications that are on earth. (this answer choice implies that

better indicators are available elsewhere - presumably closer to the sun.)
- a says that tree growth is believed to be a good indicator by people on earth (--> martians beg to differ).”

E其实不缺主语，介词结构实际上是可以做主语的，例子：
Among those who escaped was a man conviced for murder.(朗文当代英语大辞典 第49页)

谢谢