Jack has been collecting coins since two year ago.（用how long提问.）

a jack has been unplugged Jack ()a teacher for months.A.has becomeB.has turnedC.has changedD.has been helen jack for 7 yearsA has been married to B has been married to C has married D has been married to空位于helen和jack之间， jack has been dead for three years为什么用被动jack已经被死了三年? Jack‘s grandmother ___for more than twenty years.A has dead B has been died C has been died 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 jack has lost his job and been worse off than everbeen 要在been前加个has吗? Believe it or not,Jack has been to Beijing.为什么要用has been to,不用was to 3.Jack has already been to Water World.划线部分：water world.划线提问 Jack has been collecting coins since two year ago.（用how long提问.） jack has not been to this baber's shop before中文翻译 Jack's father has a_______ been to the USA many times 请问jack has been busy _ his report.这句话中应该填什么 Have you seen Jack these days?---- No,I haven’t.He _______ Beijing.A.have been inB.has been to C.has gone to D.has gone Mr. Jack __China for several years. A. has beenMr. Jack __China for several years. A. has been to B. has come to C.has been in D. came to Jack is very tired,he____the house all day longA:cleanedB:had clenedC:has been cleaningD:has cleaned Jack ( )Mary for 30 years.A.has married B.has been married toC.married to并说明理由