By last term we ___ 2000 English wordsA、 have learned B、haf learned

By last term we ___ 2000 English wordsA、 have learned B、haf learned We ___(be) to three countries by the end of last term. 是by last term还是 by the last term By the end of last term,they ___(work)there for ten years.能讲出为什么吗 By the end of last term, they ___(work)there for ten years. We had learned over three thousand words by the end of last term .改为同意句 by the end of this term,we ___(learn)5000 english words.应该填什么?为什么不用完成时? by the time of last term ,we have finish all the lessonswe had invented many new things by the time of last years两个句子都是by the time ,主句的时态为什么不同? We ______(learn)four English songs since last term. By the end of last term,we _____ about twenty English songsA.had learnedB.would learnC.have learnedD.learned选哪个?为什么? We had learned about 1200 english words by the end of last term为什么是过去的过去,我觉得这里用have learned就可以了呀 truth真相可数吗?还有一题:By the end of the last term,we ______(study) three thousand words.是填had studied 还是 has studied? by end of last term 和last term 什么区别呢?She must have studied very hard by end of last term,hadn't she ?She must have studied very hard last term,didn't she ? LInda attended four courses last term.(对划线部分提问：four) ___ ____ ___ __ ____ ____last term?we have 500 grams of beef inthe fridge.(划线部分提问：500)___ ____ ____ ___ ___ __in the fridge?There are too few chairs for everyone here. We will ___ ___ ___ English this term .这学期我们将会快乐的学英语。 We visited the Great Wall last term.We never there before.空处填什We visited the Great Wall last term.We never there before.空处填什么？had/have been?before是否意味着before last term by went last we airplane there weekend John said to his parents,''I had learned 500 chinese words by the end of last term.''变为间接引语by the end of last term不用改成by the end of the term before吗?