He is moving about in his office?.

He is moving about in his office?. Oh,he m___ is in his office 什么is you father?He is in his office. he is at his office He minds so much about his position in the office that he __ the light in his office is ob.he be in his of He is the busiest man______ his office?A.in B.of.应该填什么?in 还是 Where is Mr Li?___ he is in his office now.Go and find him. 3.---Is John _______ person in his office?---Yes.He is _____ Mr.William is( ) work in his office Don't interrupt him.He is in his office,____himself ____work 求It is three years since he worked in his office.解释下since