[求助]旧prep139，倒装

139.       (32262-!-item-!-188;#058&006043)

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

这道题解释说是倒装，主语是rate，谁能帮我把它正过来说一遍。看不懂。。。。。

我原本也以为是二楼的那个答案，但是不确定为什么倒装了连谓语动词也要变呢？

我也觉得是The rate at which trees grow is believed to be among the surest indication on Earth of sunspot cycles.

他的倒装句不应该是：among the surest indication on Earth of sunspot cycles is believed to be the rate that trees grow.

而文中为什么是among the surest indication on Earth of sunspot cycles are believed to be the rate that trees grow.

请NN指点倒装的用法，我也查一些，等会贴过来

还是不明白，没有找到更改谓语动词的倒装的例子。。。。。。

答案是e...