Prep-61

61. 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

Answer: E

我選了C, 不過題目還是看不太懂...

有高手指點一下嗎?

謝謝!

A: among倒装，主语应该是the rate所以用单数is

B: 同上

C: their的指代存在歧义，离它最近的是sunspot cycles

D: believed应该用被动

E: correct

注意：

1、             倒装结构下谓语和主语的主谓一致

2、             了解清楚On Earth的修饰对象是谁

3、             Their出现指代问题