问题描述: By the end of last year,they _____(learn) two thousand English words. 1个回答 分类:英语 2014-11-12 问题解答: 我来补答 had learnt或者 had learned因为by the end of last year终止点是过去的时间,所以用过去完成时,至于learn过去分词的拼写,两种都可以. 展开全文阅读