They were an elderly couple who lived in an old house on what was left of the family farm.on what was left of the family farm.为什么要加一个On?

they were an elderly couple who lived in an old house on __ was left of the family farm.为什么是what 不是which不是做定语吗 they were an elderly couple who lived in an old house on what was left of the family farm.帮我分析一下句子结构,我很不明白后面on what was left of the family farm.是怎么回事, They were an elderly couple who lived in an old house on what was left of the family farm.on what was left of the family farm.为什么要加一个On? 英语作文,改改.Elderly teacher and young teacher With the development of society,teachers play an important role in society.Some students may like elderly teachers` reaching because they think elderly teachers have more teching experience and th Many elderly people have to live on money they ____ when they were working.a.laid up b.put back c.set up d.put aside 英语短文改错 急After shopping,Mother and I went to a restaurant for lunch.I notice mother looking at a nearby table occupy by an elderly woman and young couple.They ate silently,and it was clearly that things were not going well.As we left,Mot They were the same age.和They were of an age.哪对? they were here about half an hour ago they were having an important meeting改为否定句 they were a___ to sing an english last week They were of an age.动词为什么用过去时? They were of an age.动词为什么用过去时? THey were indroduced by an old friend ten years ago 英语理解some of an elderly mouse’s liver genes can be made to behave as thesome of an elderly mouse’s liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.1翻译2 can be made to be _______ foolish they were!They believed what the man said.A.How B.How an C.What D.What an they were expect to be here an hour ago,but they haven't appeared so far(同意句) they were _ be hethey were expect to be here an hour ago,but they haven't appeared so far(同意句)they were _ be here an hour ago,but they haven't appeared so far They may visit a home for the elderly this Sunday同义句()they()()a home for little did I know that they were an understanding bunch怎么理解