听力原文：In several metropolitan areas, from Miami to Riverside, Calif., where the real es

tate market is white hot, rapidly rising prices are luring a growing number of ordinary people into buying and selling residences they do not intend to occupy, despite warnings from some economists that prices cannot continue to rise as steeply as they have in the last few years.

Which of the following statements is true according to what you hear？

A．Prices for houses in big cities have started to rise since this year.

B．People buy and sell houses to improve their living conditions.

C．Economists believe that residence prices would drop.

D．Economists warn people that price rise might slow down.