题目

阅读理解     Giant pandas have been living on Earth for millions of years. Other animals that lived long ago, such as stegodons and smilodons, have since died out. But we still have pandas with us today.     Pandas can change their diets to fit into different environments, according to Wei Fuwen from the Chinese Academy of Sciences.     Researchers studied the bones of 12 giant panda fossils (化石). They found that pandas went from being meat eaters to becoming plant eaters over time. They mainly ate bamboo, as they still do today. Other large meat eaters had no interest in bamboo, so pandas could live safely in bamboo forests. That is one of the reasons they have been around for so long.     In addition, pandas are very strong and have great bite force (咬合力). They can also climb trees. Both of these abilities helped them stay alive in the past.     However, pandas are facing some problems. There are fewer pandas in the world today. They are dying out mainly because of habitat loss. People have cut down forests to build houses and farms. This has caused pandas to lose both their food and their homes.     Pandas also have problems giving birth to babies. Female pandas can only get pregnant(怀孕) once a year and they are very choosy about their mates. And because they mainly eat bamboo, their milk is low in nutrients(营养). This makes it harder for their babies to survive. （1） According to Wei Fuwen, pandas haven't died out because they _____. A . have thick fur to live through the cold weather B . can run fast to escape from their enemies C . can change their diets to fit into new environment D . can kill other bigger animals around them （2） Female pandas can get pregnant _____. A . once a year B . twice a year C . twice every five years D . three times every four years （3） What is the main problem pandas are facing now? A . Climate change. B . The loss of their habitat. C . Natural enemies. D . Dangerous diseases. （4） According to the story, it is hard for baby pandas to survive because _____. A . they are very short when they're born B . panda milk is low in nutrients C . their parents don't take care of them D . they aren't used to cold weather 答案： C A B B

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