用方框中所给单词的适当形式填空，使短文通顺、正确、连贯(每个单词限用一次)。
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when spend interesting be good study dangerous nature around they thousand keep care open through |
The world of the out-of-door is full of secrets . There are so many secrets, and they are so interesting that 56 of men and women, boys and girls are busy 57 them. Birds, animals, trees, and flowers are all 58 us. That facts about how they live and grow 59 interesting.
Do you know that once one of the greatest presidents of the USA 60 hours and hours studying birds? A businessman lives near New York City. He became so 61 in insects that he began to collect them. He now has over one thousand different kinds of them. They are all 62 in glass boxes.
Now come with me, and I will help you find some of 63 secrets. Let us go quietly 64 the forest and fields. Here we shall find how a hare tells the other hare where there is 65 . We shall follow a mother bear and her young ones 66 they try to look for food and get ready for 67 long winter sleep. We should watch bees dancing in the air to tell the other bees where they can find food. I’ll show you many other interesting things, but the 68 thing I can tell you is to keep your eyes and ears 69 when you go out of the door. Nature tells secrets to people only when they look and listen 70 .