Mary has come back from China______.A.for two years B.since

Mary has come back from China______.A.for two years B.since mei lin has been a teacher ---.a.since two years b.since two The supermarket ___ since two years ago.A.was open B.has bee It_____five years since he has left for Beijing.A was B has It ____ five years since he has left for Beijing.A.was B.has John ___ Mary for 3 years .A.has married B.has got married t He has __ for two years.B.left home; C.been away from home When did you start to play the piano A.For two years B.Since My aunt has been a teacher ____ten years ago.A.for B.since C It was over two years since I came back from the countryside She _____ in Shanghai for ten years since 1992.A.has lived B she it for about two years.A bought B has bought C has had