By the end of last month, we (learn) ______ more than one thousand English words.

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问题 By the end of last month, we (learn) ______ more than one thousand English words.

选项

答案had learnt

解析 截止到上个月我们已经学了一千多个英语单词。本题考查动词的时态。by the end of 为完成时的标志,last month是表示过去的时间状语,因此用过去完成时,即had learnt。
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