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题库 / Prep2007E1-SC-139
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.
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow
On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth
On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles
Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate
Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow
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1. A是倒装句，应该用“is belived to”
2. 状语修饰最近的句子，C是“is belived to be”, E是"at which tree grow," 再看后面衔接的“as seen in the rings visible in the cross sections of their trunks.” 根据句意，年轮应该是看出树在增长。
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