He has been an architect()he graduated from the university.A.after B.since C.before D.when

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Hehasbeenanarchitect()hegraduatedfromtheuniversity.A.afterB.sinceC.beforeD.whenHehasbeenanarchitect(

He has been an architect()he graduated from the university.A.after B.since C.before D.when
He has been an architect()he graduated from the university.
A.after B.since C.before D.when

He has been an architect()he graduated from the university.A.after B.since C.before D.when
选B.如果选A的话主句就不该用完成时而该用一般过去时了.

afafgea

额,看错了,是选B。

B.since
因为前边用了完成时