Questions 11 to 18 are based on the conversation you have just heard.

A．Because more and more people move into big new houses.
B．Because many old people sell their house after their children leave.
C．Because people want to sell the old house to get money and build their own house.
D．Because children often ask their parents to sell the old house.

A．Because of the bad weather.
B．Because of his young age.
C．Because he lost his way while crossing the ocean.
D．Because he had no partner to help him.