I _____900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt
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![I _____900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt](/uploads/image/z/5783523-51-3.jpg?t=I+_____900+English+words+by+the+time+I+was+ten.A.learned+B.was+learning+C.had+learned+D.learnt)
I _____900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt
I _____900 English words by the time I was ten.
A.learned B.was learning C.had learned D.learnt
I _____900 English words by the time I was ten.A.learned B.was learning C.had learned D.learnt
C
by the time I was ten 是过去完成时的标志
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。
选C
到我十岁的时候我已经学了900个单词了。
C.had learned