Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldn’t trees have ways of sending message?

　　1. It can be concluded from the passage that caterpillars do not feed on leaves that ______.

　　A. are lying on the ground

　　B. have an unpleasant taste

　　C. bees don’t like

　　D. have an unfamiliar shape 2. The willow tree described in the passage protected itself by ______.

　　A. growing more branches

　　B. communicating with birds and bees

　　C. changing its leaf chemistry

　　D. shaking caterpillars off 3. According to the passage, the willow tree was able to communicate with other trees by ______.

　　A. waving its branches

　　B. giving off a special smell C. dropping its leaves D. changing the colour of its trunk

　　4. According to this passage, bees

　　communicate by ______.

　　A. making special movement

　　B. touching one another

　　C. smelling one another

　　D. making unusual sound 5. The author believes that the incident described in the passage ______. A. cannot be taken seriously

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