They ——about eight hundred English words by the end of last

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They ——about eight hundred English words by the end of last term
A.have learned B.had learned为什么选B?

B.had learned
by + 过去某一时点要和过去完成时连用
因为by 意为“不迟于”“在...之前”"到.时候”
by the end of last term 到上个学期末,所指的时间为【过去的过去】,所以要和【过去完成时】连用
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They ——about eight hundred English words by the end of last They ____（learn）about eight hundred words by the end of last We had learned about 1200 english words by the end of last t By the end of last year he______about 1500 English words. I _____1000 english words by the end of last term of,leard,by,hundred,end,English,week,I,had,two,words,the,las 英语语法1)We had learnen ( ） English words by the end of last ye How many English words （）you（）（learn）by the end of last term How many English words you by the end of last year? How many English words have you learned by the end of last t We had learn 1,000 English words by the end of last month.我的 By the end of last term they ________ over 1000words