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( ) 15. About seventy percent of our earth _______ by water. A. is covering B. is covered C. are covered D. are covering 三、完形填空: (共10小题，每小题1分，满分10分) The world of out-of-doors is full of secrets. And they are so interesting that quite a lot of people are busy studying them. All around us are birds, animals, trees and flowers. The facts about how they __1__ and grow are as interesting as anything could be. Do you know that one of the great Presidents of the USA spent hours and hours __2__birds? A businessman who lives near New York city became so__3__ in insects that he began to collect them. He now has more than one thousand different kinds carefully__4__ in glass boxes. Come then with me, and I will help you find some of nature’s secrets. Let us go__5__through the woods and fields. Here we shall find now a rabbit tells the other rabbits that there is danger. We shall __6__a mother bear and her young ones as they look for__7__ and get ready for winter sleep. We shall watch bees dancing in the air to let other bees know__8__ they can find food. I will show you many other inte resting things, but the thing that I can__9__ you is to keep your eyes and ears __10__ when you go out of doors. Nature tells her secrets only to people who look and listen carefully. ( ) 1A. bear B. live C. speak D. fly ( ) 2.A. studying B. eating C. learning D. finding ( ) 3.A. friendly B. carefully C. busy D. interested ( ) 4.A. locked B. kept C. put D. filled ( ) 5.A. near B. quickly C. quietly D. politely ( ) 6.A. hear B. follow C. catch D. help ( ) 7.A. food B. fruit C. vegetables D. water ( ) 8.A. how B. why C. where D. when ( ) 9.A. make B. pass C. give D. teach ( ) 10.A. closed B. open C. safe D. clean 四、阅读理解(共10小题，每小题2分，满分20分) A In nature, you may see many insects (昆虫)and animals of different colors. Have you ever wondered why? Locusts are super delicious food for birds, but it is not always an easy job for birds to catch them. It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young, locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do. (责任编辑：admin) |