By the end of last year, they _______ 2,000 English words. A

By the end of last year, they _______ 2,000 English words.
A. learned
B. have learned
C. had learned
D. learns
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heima6668 幼苗

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C

本题考查过去完成时的用法。即表示发生在过去某一时间(By the end of last year)之前的动作。

1年前

3
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