单项选择题
A．many animals die during hibernation B．hibernation protects animals during the wintertime C．scientists feel puzzled about hibernation D．some bats hibernate and others do not
A．think carefully about what they read and hear B．wear mismatched socks during political campaigns C．never trust anyone D．vote for female candidates
A．Traffic Crowding in New York City B．Air Pollution in New York City by Cars C．Special Lanes for Passengers D．A Solution to Traffic Problem in New York