【正文】 h level, some athletes bee coaches. Firefighters and police officers are important job that help and protect people. These careers require applicants to plete training programs and pass the written and physical tests. These jobs can be exciting and dangerous so they require courage and sometimes sacrifice. When considering salary and benefits, some of the lowest paying jobs are in the hospitality and beauty industries. For example, food service worker and hairstyles generously have low salaries. This kind of job don’t require much of the education or training. But again, if you enjoy what you’re doing, that may be good enough. For example, you may really enjoy talking with your customers. Spending your life doing something you dislike can be very unsatisfying, even if the salary is high. Some of the highest paid professions includes doctors, lawyers and scientists. However, these professions require high level of education and training. The path to being a doctor, for example, is a long one. Doctors require a university degree, several years in medical school, and several more years in experience. Only then are they certified as a medical doctor or MD. So it doesn’t make sense to consider these professions unless you are willing to work hard for many years. And because, you should really care doing the work well. L4 Unit 34 vocabulary 戰(zhàn)爭(zhēng)和生物Civil wars are fought between citizens of the same country and are fought within the country. If citizens of a country disagree about the policy or leader, they may fight a civil war. A world war is fought when countries form alliances and these alliances fight each other. A world war involves many or most of the world’s most powerful countries. There were 2 world war in the 20th century. Terrorism involves groups of individuals rather than countries. Terrorists may e from different countries and they may share the same beliefs. Terrorists often use carbombings or suicide attacks on innocent people. A terrorist attack can happen at any time and any place. An invasion occurs when one country attacks another. It sends its army to the other country and attempts to take control. One of most famous invasions was when France invaded Russia in 1812. A defensive war occurs when a country is attacked and needs to defend itself. Most of countries have military so that it can defend itself if it’s attacked. when France invaded Russia in 1812, the Russia army fought a defensive war and defeated the French army. A cell is the basic unit of life. A cell is smallest structure that can live and reproduce. Cells grow and develop, reproduce and interact with the environment. Photosynthesis was one of most important biological processes. It allows plants to capture and use light as an energy source. photosynthesis is the process of converting light energy into chemical energy. A virus is small biological structure that attacks and enters cells. Once inside a cell, a virus reproduces and makes many copies of itself. Some diseases such influenza (流感)are viruses. Bacteria are onecelled forms of life that are all around us. Although they have a single cell structure, they are very important. Many bacteria are inside us and help us digest our food. DNA is a plex molecule that stores information and can make copies of itself. Nearly any cells in a person’s body has the same DNA. The information stored in DNA tells cells what to do and it’s necessary for reproduction. L4 Unit 33 dialogue 旅館更換房間Good evening, sir. How can I help you?Yes, we just check in and our room is unacceptable. It’s room 1810. Is there something wrong with the room?Yes, there certainly is. We requested a nonsmoking room but the room smiles of smoke. Let me check. Yes, that room is supposed to be a nonsmoking room. Well, somebody certainly doesn’t follow the rules. The current smoke is cigars. We can hardly breath and the windows don’t open. Right, the windows don’t open, sir. I really sorry about this. Let me see if I can find you another room. Yes, please. We certainly can’t stay in that room. Both our kids have asthma, so the smell of smoke can cause breathing problems.Yes, I understand your concern. Sir, I’m afraid we don’t have any other rooms with two double beds. If you’ll excuse me, I will speak with my manager. Thank you. We were really tired and we would like to get rest as soon as possible. Yes, I understand. If you don’t mind, could you wait in the lounge near the elevators? I shouldn’t be long.Sure, I hope it doesn’t take time.Good evening, I’m the manager here. I’m sorry to hear about your room. Yes, we are not happy and we were really tired. I hope you can help us. I’m sure we can. Since we don’t have another nonsmoking room for you, we will upgrade your suite. Will that be ok?Yes, there will be fine. There is no extra cost, right. No, sir. There would be no extra charge. And it’s nonsmoking, right. Yes, sir. I’ve confirmed that is nonsmoking. Thanks I really appreciate your help. It’s my pleasure, sir. I hope you and your family have a wonderful stay with us. Here is my card. If there is anything else I can do for you, please let me know. I will. Have a good evening. Thank you, sir. And once again, let me apology for the same inconvenience.