Questions 11～13 are based on the following dialogue about post service. Where does this conversation take place

A．A healthy, co-operative family is a basic ingredient of a healthy society.
B．Men are basically opposed to sharing household chores.
C．Division of household responsibilities is workable only in theory.
D．A woman's place in the home--now as always.

A．Earth.
B．A planet.
C．Sun.
D．Any star.

A．There are many planets which are like the earth.
B．We have been sending radio messages to the outer space since the beginning of the last century.
C．The distance between us and other inhabitants of the universe is perhaps too large to be conquered.
D．There are probably other intelligent life like us existing somewhere in the universe.