单项选择题
A．to occupy the best resting places B．only when it is dark C．to protect their homes from outsiders D．when there is not enough food
A．They only care for their own babies. B．They share the feeding of their young. C．They help when a baby bat is in danger. D．They often leave home and forget their youn
A．fly out toward the sun B．look for a new resting place C．come back to their home D．go out and look for food