A. the change of colour in locusts

　B. the protective colouration of animals and pests

　C. how a certain sea fish protects itself

　D. animals or pests can dye themselves different colours

25. The pests that have different colours from plants usually appear at night because ______.

　A. their enemies can easily find them and eat them

　B. they have the habit of coming out in darkness

　C. it's easy for them to destroy plants in darkness

　D. birds take their rests when night comes

26. What does the underlined word "invisible" in Paragraph 3 mean?

　A. Can't be seen B. Can be seen C. Can't move D. Can't change

27. A certain fish living in seas has lived through millions of years because ______.

　A. it is the most powerful in the sea

　B. no other fishes can swim as fast as it can

　C. it can send out a kind of liquid which makes its enemies unable to find it

　D. the liquid it sends out can kill its enemies

　　C

　　I have forgotten the name of the old lady, who was a customer on my newspaper route when I was twelve-year-old boy back in 1954. Yet it seems like just yesterday that she taught me a lesson in forgiveness that I can only hope to pass on to someone else someday.

　　On a Saturday afternoon, a friend and I were throwing stones onto the roof of the old lady's house. I found a smooth rock and sent it. The stone headed straight for a small window on the old lady's back door. At the sound of broken glass, we took off from the old lady's yard.

　　I was too scared about getting caught that first night. However, a few days later when I was sure that I hadn't been discovered, I started to feel guilty for her misfortune.

　　She still greeted me with a smile each day when I gave her the newspaper, but I was no longer able to act comfortably when seeing her.

　　I decided to save my paper delivery money, and in three weeks I had the seven dollars that I thought would cover the cost of her window. I put the money in an envelop with a note saying that I was sorry for breaking her window and hoped that the seven dollars would cover the cost of repairing it.

　　The next day, I handed the old lady her paper. She thanked me for the paper and gave me a bag of biscuits she had made herself. I thanked her and ate the biscuits as I continued my route.

　　After several biscuits, I felt an envelope and pulled it out of the bag. When I opened the envelope, I was shocked. Inside were the seven dollars and a short note that said, "I'm proud of you."

28. What work did the author do at the age of 12?

　A. Delivering newspapers B. Collecting old papers

　C. Picking rocks D. Repairing roofs

29. Why did the author and his friend escape from the old lady's yard?