Sally has become a computer programmer since one year ago.错在哪 为什么`

Sally has become a computer programmer since one year ago.错在哪 为什么` he has become a Jack___a teacher for months.A.has become B.has turned C.has changed D.has been When loneliness has become a 求一英语病句改法Sally has become a computer programmer for one year .我原先是把become 改为became.然后看答案是been.这是怎么搞的?我改的不对? Jack __a postman for about 6 years.a has become b.has returned c.has changed d.has been Jack ____a postman for about six years.A has become B has turned C has changed D has been He__a teacher for nearly five years.a.has been b.has become c.was d.became In that county,the rich__richer,the poor ,poorer.A.become B.has become C.becomes D.is becomeing With the elevation of people's standard of living,cosmetics always()a favorite+topic,especially among women.A.has become B.becomes C.become D,have become Her sister has become a lawyer,____ she wantHer sister has become a lawyer,____ she wanted to be.A who B that C whom D which become a member和be a member的区别如题He_______a party member for one year.A.was B.became C.has been D.has become They said that your basketball team( )the best in your school.A.will become B.would become C.has become D.are becoming Difficult work ______ easy if you do it very carefully.A.become B.became C.will become D.has become 请说明why? The garden with thousands of tress__place of interest.A.has B.are C.has become D.is becoming a the internet has become part of ......life A every day B everyday C everywhere Deverything He has become more and more confident____the years.A over B for C on D with getting online ——become popular.a.is b.are c.has d.have