Is this ________ key, Tom? —No, that one is ________.
When are you going to Hainan? — I am going there _____ June 8, 2007. [ ]
Listen! Is Mary playing the piano in the room? –No. It ________ be Mary. She has gone to Hong Kong.
He has poor eyesight _______computer work.[ ]
I don’t like _____of the sweaters. Please show me a third one.