听一段材料，回答下面几个小题。
What’s wrong with the two speakers?
A.They don’ t have an engine.
B.Their tank is half full.
C.They run out of gas.
Where are they going?
A.To the seaport.
B.To the railway station.
C.To the airport.
What should they do now?
A.Do nothing but wait.
B.Find a policeman.
C.Telephone the nearest gas station.