是by last term还是 by the last term

是by last term还是 by the last term I _____1000 english words by the end of last term by the end of last term是过去完成时的标志词吗 by end of last term 和last term 什么区别呢? We _____ (learn) 1500 English words by last term. By last term we ___ 2000 English words Last week, he told me that by the end of the next term, he _ by the time of last term ,we have finish all the lessons By the end of last term, they ___(work)there for ten years. By the end of last term,they ___(work)there for ten years. How many English words （）you（）（learn）by the end of last term We ___(be) to three countries by the end of last term.