I _____900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt

分类: 作业答案 • 2022-01-02 15:32:14

问题描述：

I _____900 English words by the time I was ten.
A.learned B.was learning C.had learned D.learnt

答

C.had learned

答

选C
到我十岁的时候我已经学了900个单词了。

答

C
by the time I was ten 是过去完成时的标志

答

C
我十岁时已经会认900个英语单词了。
要用过去完成时，所以选C。