To pay the debts which are due in July, Russia will have to pay out a sum of_________.

A．He wants to buy a second-hand ear.
B．He wants to search for his lost car.
C．He wants to talk about different kinds of cars.
D．He wants to know the latest model of cars.

A．A student and a professor.
B．Two students.
C．Two dentists.
D．A dentist and a patient.