单项选择题
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
A．double their number every year B．lose a lot of their babies C．move from place to place constantly D．fight and kill a lot of themselves