[题目]I 900 English words by the time I was ten.A.learned B.was learningC.had learned D.have learned 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】I______900 English words by the time I was ten.

A.learned B.was learning

C.had learned D.have learned

【答案】C

【解析】

试题分析：句意：到十岁时，我已经学了900多个英语单词。由by the time 引导时间状语从句，一般情况下从句谓语动词用一般过去时，而主句谓语动词用过去完成时。过去完成时的基本结构为“had+动词的过去分词”。故选C。

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