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By 1940,the pilot Jacqueline Cochran held seventeen official national and international speed records, and she “earned them at a time when aviation was still so new for many of the planes she flew to be of dangerously experimental design.”(引号为划线句子)
(A) and she earned them at a time when aviation was still so new for many of the planes she flew to be
(B) earning them at a time when aviation was still so new for many of the planes she flew were
(C) earning these at a time where aviation was still so new such that many of the planes she flew were
(D) earned at a time in which aviation was still so new such that many of the planes she flew were
(E) earned at a time when aviation was still so new that many of the planes she flew were
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正确答案E,
请教一下A 有什么问题呢?
多谢!
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