A．They have three children already. B．Cathy wishes to have a baby, but Tom doesn’t. C．They will start a family as soon as they get married. D．They don’t want children for the time being.

单项选择题

A．They have three children already.
B．Cathy wishes to have a baby, but Tom doesn’t.
C．They will start a family as soon as they get married.
D．They don’t want children for the time being.