Chia động từ trong ngoặc 1.Alexander Graham Bell.......(already invent)......the tslephone by the time my grandfather was born. 2.when I phoned julia night,she.....(wash).....her hair. 3.janet.....(try)......to get online to go internet shopping for an hour. 4.Only coffee and bread...(serve)....at the party yesterday. 5.jim(collect)....picturebooks for ten years. 6.after I had finished my work last night,I(meet)......my friends at our club. 7.When she(hear)....the phone,her baby suddenly cried out in the next room. 8.At the interview this morning,I(ask).....many complicated questions by the manager. 9.The boy broke window when he(play).....football. 10.Before nam went for a walk,he(finish)....his homework. 11.you(receive)..... any letter from your parents yet? 12.The asian games(hold)....every four years. 13.When I arrived at the station,the train(leave)....for 15 minutes. .