— Of course. They are ________ hard woods.

    It was a hot, sunny day. The waves(浪)off Santa Barbara were almost three feet high because of a strong wind. Surfers(冲浪者)were having fun. Then the fun 1. One surfer started shouting. Surfers on the 2 saw his arms going up and down. He went under water. Then he came back 3, shouting for help.

    "He was in big 4," said one woman. She called 911. He was still shouting and 5.

    They could not see a shark(鲨鱼), but they 6 the surfer was being attacked(袭击)by one. Again, the surfer went under. Four surfers jumped onto their boards and swam quickly out to the surfer. By the time they got to him, he was 7. The shark had given up on the taste of the swimwear and the fight with the surfer.

    The 24-year-old man was in great pain, but he was still alive. The surfers put him on a board and swim back to the beach. "I don't think he's going to make it," said someone on the beach. "Look at his 8."

    A helicopter(直升机)arrived quickly and doctors jumped out. They 9 the surfers and the woman for their help, and took the man to the hospital. An hour later, the hospital said that the surfer would keep on 10. The man lost one of his legs but he was still so lucky

    Can trees talk? Yes — but not in words. Scientists have reason to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First a willow tree (柳树) attacked in the woods by caterpillars (毛毛虫) changed the chemistry of its leaves and made them tasteless so that the caterpillars got tired of the leaves and stopped eating them. The even more astonishing, the tree sent out a special vapor— a signal causing its neighbors to change the chemistry of their own leaves and make themselves taste also terrible, too.

    Talking, of course, doesn't need to be always 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 messages?

People need to enough nutrition every day.

They are very rich. Even their chopsticks silver.

— ________.