【正文】 te them to work hard. As a result, employer turnover is low and the pany has been recognized as one of the best panies to work for. In addition, Emma’s best supports local charities, especially those that provide health foods to children from lowine families. Given its success, the pany feels an obligation to contribute to society. In spite of the fact that other pany now produce similar products, Emma’s best remain s the market leader. Their totally mitment to quality has made the difference and they are proud of their acplishments.L5 Unit 13 vocabularyPeople are often nervous or apprehensive before performing in front of an audience. People who are really nervous may feel tense which is the opposite of the relaxed. Someone who strongly believes in their ability to do something is often confident. The best way of build confidence is to practice what you’re going to do until you can do it with ease.To be indifferent means to not care one way or the other about something. If you are indifferent to a person or project, it means that the person or project isn’t i mportant to you.To be appreciative is to be thankful or grateful for something. If someone does something nice for you, you should appreciate it.To be depressed is the opposite of to be happy. When someone is depressed, they feel very sad.Aggressive people often push their only ideas or try to force others follow them. Someone who is passive will usually not resist that of others.An optimistic person believes in a positive future. Optimists see a glass of half full rather than half empty. The opposite of an optimist is a pessimist.Sensitive people are emotional and have strong feelings about things. It’s important to be careful when dealing with sensitive people because it’s easy to upset them. Insensitive people don’t seem to be aware o f or care about the feeling of others.A mean person doesn’t treat other people well or with kindness. Mean people often enjoy making people suffer for their mistakes. To be kind is the opposite of to be mean.Conceited(自負(fù)的)people have very high opinion of themselves. They often talk about how great they are and tend to exaggerate their strengths. Modest people don’t show off their strengths but they’re often very good at what they do. L5 Unit 13 dialogueAce industry, may I help you? This is Sue Mitchell speaking.Hi, Sue, this is Ben Wong of Joblink.Oh, hi, Ben, how are you? I’ve been expecting your call.I’m sorry to be late. I’ve been traveling.It seems like everyone is traveling these days.That’s for sure. I’m away more than I’m here. Anyway, I’m calling to see if we can arrange a meeting.Good, there were several matters I’d like to discuss with you.Sure, will later this week be possible?Let me see. According to my schedule, I’ll have something Thursday afternoon and Friday morning.How long do you think we will need?I think an hour should be enough.That should be fine. Would Thursday at 3:30 work for you?Yes, that’s fine. Ok, I’m looking forward to seeing you at 3:30 at Thursday.Right, see you then and thanks.You are wele, Ben. Take care.Hi, sue, I’m sorry but something urge has e up so I’d like to change the time for our meeting on Thursday.Oh, I’m sorry to hear that. What about Friday morning?That should work. How early?I’m usually here by 9 o’clo ck. Could you be here by then? Yes, that shouldn’t be a problem.Ok, Friday at 9 o’clock.Once again, sorry for the last minute change.L5 Unit 14 ListeningThere are many mysteries in nature. Mysteries are things we don’t understand, such as how the Egyptian pyramids were built. In fact, we are surrounded by mysteries. What we know about the world, seems like very little. Scientists tell us that what we see in the universe is only a small part of what is there. The rest is invisible, including dark matter and dark energy.These two unknowns made up around 95% of the universe. Evidence for their existence es from their effects on what we can observe, such as the motion and positions of the distant galaxies.Yet thought we know very little, we are able to build airplanes and municate with smartphones. In some ways, we humans are very smart or at least we think we are. We still need to face big issues, like climate change and that’s going to be a huge challenge. The challenge for humans will be our abilities to adapt to our changing environment.What about other form of life? How do they adapt? Seasonal variations, for example, can be one of the greatest challenges for animals to overe. Overing such challenges will be a great achievement but hardly easy. Some birds migrate thousands of kilometers each year, to deal with seasonal changes. These migrations are don’t carry maps or passes, yet they know where to go. They had developed their abilities to see the earth magnetic field. This ability is a wonder of nature. It takes advantage of the fact that the earth is like a huge bar has north polar, which is positive and south polar, which isnegative. Somehow the birds are able to see this magnetic field and use it to their advantage.And even the way birds fly together is amazing. many migrating birds fly in a V formation. They do this to conserve energy. In a V formation, birds can use the energy of the birds in front of them. This energy es from the air currents, generated by the wings. Conserving energy is necessary for the birds to survive in long journey. how do the birds know this? It’s truly amazing how the birds know this.Another amazing example of survive animal is the Salmon. Salmon spent most of their lives in the ocean which is saltwater. Yet, when it’s time to breed, they do so in fresh water rivers. Salmon can adapt their bodies to survive in both saltwater and freshwater. When it’s breeding time, they returned to the same river where they were born. It seems as if they had builtin map that guides them for hundreds of miles.Once they left