59. 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: 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
GWD答案是C
请谁来确认一下?
另:呼吁大家订正一下prep,好像是颇有一些题目和以前的答案不一样的。
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