There ______ little water in the river.

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

---Look! That’s Amy.   ---It _______ be her. She’s gone to Xi’an.

－It’s Sunday today, so you        get up so early.－Yes, I can have a good rest.

Tom hasn’t come to work since last Friday.       he have had an accident?