IV. 篇章結構 (8%，每格 2 分)         When there’s a storm, humans can just stay indoor with a hot drink. Sadly, surviving bad weather is not an easy task forbirds. Since they can’t go underground like other small animals do, how do they survive?         In bad weather, birds are put at the risk of heat loss. Birds’ feathers trap pockets of air to keep them warm. __53__ To handle the problem of heat loss, many birds use oil stored at the base of their tail to waterproof their feathers. This enablesthem to fly in the rain for short distances. __54__ Some birds, especially small ones, have a high chance of dying fromstarvation, for the bugs they feed on tend to stay out of sight when it rains heavily.        In addition to rain, strong winds from typhoons or hurricanes are dangerous for birds. Amazingly, bords can tell when a stormis coming, as they feel changes in air pressure. __55__ In colder climates, birds also have to endure the cold thatsnowstorms bring. Fortunately, birds’ bodies are built to help them survive in the cold. __56__ Therefore, they aren’taffected by the cold ground.       As you can see, birds have a number of ways to survive bad weather. When Nature lets loose her fury, your featheredfriends are likely to be just fine.  
(A) However, if the rain lasts for too long, birds will be left with no choice but to brave the weather in search of food.
(B) As a result, birds that migrate may leave earlier to avoid the storm, while others seek shelter.
(C) Once rain water fills those pocket, the bird’s body temperature could drop too quickly, and it could die.
(D) Unlike humans, who lose heat through their feet, birds’ feet are cold.
【題組】53