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He ________ more than 5, 000 English words when he entered the university at the age of 15.


  1. A.
    has learned
  2. B.
    would have learned
  3. C.
    learned
  4. D.
    had learned
D
解析:
解析:根据句中 when引导的时间状语从句知“entered”为一般过去时,而“学习五千多个英语单词”明显发生在“入大学”之前,故主句时态应为过去完成时.命题立意:本题考查了动词的时态.要把握每个时态的具体意义.过去完成时表示“过去的过去”;
现在完成时强调对现在的影响;
一般过去时态是说明一个过去的事实;
而过去将来完成时表示在过去某个时候将会发生的事情.
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