－I’d like to help the homeless people in the earthquake. －You ________ join a volunteer group. 

—How much shall I pay for the phone call? —You________. This is free of charge.

The company is quite honest and guarantees the new product ______ be under warranty for three years.

John, look at the time._____ you play the piano at such a late hour?

Lucy doesn’t mind _______ the dishes after dinner.