[解析]
It's nine o'clock in the evening now.I'm excited.Because my family will have a birthday party for me tomorrow.The party will start at half past five in the afternoon.My brother will play the guitar at the party.My sister will play the violin.She can play it very well.My father made a big cake for me this morning.My mother went shopping in the supermarket this afternoon.I think we will have a good time tomorrow.