对learned 900 english words 提问
I___900EnglishwordsbythetimeIwasten．（）A.learnedB.waslearningC.hadlearnedD.learnt...
I ___ 900English words by the time I was ten．（ ）
A. learned
B. was learning
C. had learned
D. learnt 展开
A. learned
B. was learning
C. had learned
D. learnt 展开
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