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e trip is hard and not safe. Many birds travel in _____. A. alone B. groups C. pairs D. itself ( )4. Birds find their way by _____. A. following the wind B. listening to noises other birds make C. looking at some certain things D. looking at clouds ( )5. What can we learn from the passage? A. All the birds like to migrate. B. Animals are born naturally to be able to suit themselves to the environment. C. Many birds often migrate because they like traveling very much. D. More and more animals are losing their living areas. 【閱讀表達(dá)】 Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meateating plant is the Venus flytrap (捕蠅草 ). The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of fl book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses(壓 )the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly. Plants are living things that have leaves and roots and grows in earth. Most plants get what they need from the sun, the air, and the ground. In some pl