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[Sentence Correction]
试题详情
题目：
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.
选项:
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
答案:
E
提问：
请问Tina老师，做语法题时遇到倒装的情况，A did变成了did A，后面若还有并列动作，为了明确A的作用，您讲过A需要再出现一次，即(did A, and ...)，请问and后应是A did还是did A?
解答：
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