70. His studies of ice-polished rocks in his Alpine
homeland, far outside the range of present-day
glaciers, led Louis Agassiz in 1837 to propose the
concept of an age in which great ice sheets had
existed in now currently temperate areas.
(A) in which great ice sheets had existed in now
currently temperate areas
(B) in which great ice sheets existed in what are
now temperate areas
(C) when great ice sheets existed where there were
areas now temperate
(D) when great ice sheets had existed in current
temperate areas
(E) when great ice sheets existed in areas now that
are temperate
Verb form; Rhetorical construction
In which or when can be used interchangeably in
this sentence. The verb form here should be the
simple past existed rather than the past perfect had
existed. Now currently is redundant because both
adverbs express the same idea.
A Had existed should be existed; now currently is
redundant.
B Correct. The simple past verb tense is
correctly used in this sentence; now is placed
and used correctly.
C Where there were areas now temperate is wordy
and confusing.
D Had existed should be existed; current should be
currently; in current temperate areas is unclear.
E Now is an adverb and should be placed just
after the verb are.
The correct answer is B.
MY QUESTION IS：为什么要用过去完成时，不用过去时。
B选项中的in what？是什么意思？
各位大N能否帮着把成分划分以下？？
另：有人说OG的题目比实际上考试的题目简单很多。请问各位有经验的大N是后是真的？
不是in what , 而是existed in+ what引导宾语从句
另外，选项B 本来就是simple past tense 不是past perfect tense
His studies……led LA to propose the concept of an age
我不是牛牛，也还没有考试，所以无法回答你最后一个问题！
祝愿小宇宙爆发！
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