听一段材料，回答下面几个小题。
What is Sally doing?
A.Reading a letter.
B.Washing clothes.
C.Making a phone call.
Why does Tom ask Sally and John to call him?
A.He wants to meet them at the station.
B.He wants to invite them to dinner.
C.He wants them to visit his family.
What is Tom’s telephone number?
A.6806840.
B.7806842.
C.7807842.