单项选择题
A．For about 10 years. B．For about 20 years. C．For about 40 years. D．For about 60 years.
A．buries her eggs B．sits on her eggs C．carries her eggs D．looks after her eggs
A．to ask for help when they are ill B．to realize their big-family dreams C．to seek love and comfort D．to strengthen parent-children relations