2. 外语
  3. More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by

More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by

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问题 More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by the heart, but it went unnoticed in the West.
选项 A、but it went
B、but it was
C、although it was
D、but the discovery went
E、although the discovery was
答案D
解析 A、B、C中it指代有误，无论it指代the flow of blood或者是circle或heart，代入句中都说不通。E中用although表让步语气是牵强的，且要表示“持续不被知道的状态”，用wasunnoticed不如用D中的went unnoticed(GRE中有类似的句子：Her talent did not go incompletelyunrecognized by her eighteen—century French contemporaries．)，而was unnoticed仅能表示一个很短时间的状态。D中用discovery指代前面describe的一长串宾语，表达了句意。
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