Can you connect the keyboard _____ the computer? —Yes, I can. [ ]

__________ volunteers will be needed for 2014 International Horticulture Exposition (国际园艺博览会) in Qingdao.— Let’s go and join them.

Were the audience allowed to join in the play?—Yes, the actors_______to satisfy the audience were successful.

The man in the office ____be Mr. Black because he phoned me from London just now.

Do you want to see the film Pirates of the Caribbean 4 this evening?—Pirates of the Caribbean 4? I _________ it before. Let me see, I _________ it 2 years ago.