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1.If you write the letter on the ____________,then you can make changes easily on the screen.2.My computer gives me a message ____________,telling me that an error has occurred(发生).3.As soon as I ____________,Miranda gave me a big hug (拥抱).4.____________ are issued to make it easier for consumers (消费者) to buy products.5.Our computer system has ____________ for two days.6.He _______