【正文】 in time. If so ,you will know clearly what to do every day and your English will improve gradually. Second, it is necessary for you to go over what you have learned, which will help you understand knowledge further. What’s more, I suggest you ask for your teacher’s help once you e across any questions. Try to listen to English and talk with others in English as much as possible. Finally, just believe in yourself and never feel afraid. It is your selfconfidence that helps you succeed. I hope my suggestions can be of great use to you. Wish you success! Yours, Li Hua 。 刪除：把多余的詞用斜線（ \ ）劃掉。d always tell me I had changed her 51 in so many ways, but I could not 52 how it had happened. I would just smile, not understanding what she 53 by that. Today this girl is one of my best 54 .I really don39。 however, our mother is facing lots of problems. April 22 this year marks the 43rd Earth Day. It’s a day to remind us to care about the pla. On this day people do things to help improve the environment and cut down their energy use. Earth Day es only once a year, but it reminds people to live in a green way every day. If we truly care about the pla, everyday can be Earth Day! 24. What can people do on April Fools’ Day? A. They can fight with each other. B. They can play with fireworks. C. They can play tricks on each other. D. They can make others angry. 25. Why did only 245 athletes take part in the first Olympic Games? A. Because most people weren’t interested in it B. Because munication wasn’t developed C. Because King Gee I didn’t allow the news to be spread D. Because the journey to Greece was too long and expensive 26. Which of the following isn’t the reason for high blood pressure? A. Too much drinking B. Too much stress C. Too little exercise D. Too much salt 27. Why does the writer write the text? A. To ask us to respect tradition B. To tell us some important days C. To ask us to protect the environment D. To tell us how to celebrate those days C Dogs have long been known to pick up scent(氣味） that humans can’t, but they may also be able to tell time using their noses. The theory has been around for some time, but a new book backs up the idea that “dogs smell time”. “As each day has a new smell, its hours mark changes in smell that your dog can notice,” explains Professor Alexandra. The dog expert makes the claim in her new book, Being a Dog, which is based on her research at Barnard College’s dog Cognition Lab, of which she is the founder. While for most humans, the world is mainly visual(視覺的 ), for dogs, their world is based on scents. Dogs are often used to sniff out drugs, explosives, and even cancers, thanks to their surprising sense of smell. Even for humans, scents can give clues as to what time of day it is, such as the smell of freshly boiled coffee in the morning. The expert believes that dogs can notice small changes in scent during the day, giving them a sense of time. “Smells in a room change as the day goes on. Hot air rises, and it usually rises in currents along the walls and will rise to the ceiling and go to the center of the room and drop.” Professor Alexandra explained in an interview with Fresh Air. “The dog, I think, can smell the movement of that air through the room.” She adds. This could explain why a dog can tell when its owner is due to return home. If the loyal dog is able to notice the level of its owner’s declining scent since he/she left the house, it may be able to predict roughly when he/she is due to e back. 28. What does the underlined phrase in the first paragraph mean? A. Supports. B. Challenges. C. Doubts. D. Raises. 29. What has the expert found? A. Dogs can pick up scents that other animals can’t. B. Dogs may not be that sensitive to scents. C. Dogs have a special sense of smell. D. Dogs can tell time through smells in the air. 30. How do