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Read the following article and select the best answer. Article: You've bought what you need. The grocery cashier asks, "Will that be paper or plastic? You reply "Plastic, please." This seems like a simple question and there are plenty of reasons we choose plastic: easier to carry, lighter than paper bags, possibly less damaging to the environment, less expensive to the shop owners, able to be used as trash bag, and so on. There are different opinions on plastic and paper. Now let's follow the travels of 3 plastic bags. It begins at the grocery store with the customer's choice. Plastic Bag 1: As the waste engineer come by and pick up the trash, the first plastic bag falls out. It sits on a small street for a couple of hours until a car comes along and takes it down to the road. Then a gust of wind blows it across the road, then another car, then another gust of wind finally makes its way to the beach. Water fills the plastic bag and makes it look like a jellyfish. A seal swims by, thinking it looks very interesting, and swallowed it. The plastic bag may stay in the seal's stomach for months, maybe years. You see, our lovely animals have been living thousands of years in a world where everything can be eaten. Plastic Bag 2: This bag does make its way to landfill . Before they have a chance to cover up the thousands of pounds of daily waste, a strong wind comes up and blows these plastic bags out of the landfill. Once the wind stops, workers will be sent to collect thousands of bags around. But they can't possibly get them all. So our little bag continues his adventure getting caught in trees, eaten by birds or making its way to our lakes or rivers. Plastic Bag 3: The last bag also blows away but is caught in a landfill where it sits for many years, as all the trash is wrapped in a big plastic bag, making natural degradation impossible. Although workers do much work to make sure water and air system won't be polluted, some do. Guess what, plastic bags are made from petrol, a harmful waste material, which in one way or another makes its way to the environment. Another... Question: What is the overall tone of this passage? - Excited - Serious - Ironical - Casual
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Ironical

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Read the following article and select the best answer. Article: Adam Smith was the first person to see the importance of the division of the labor. He gave us an example of the process by which pins were made in England. One man draws out the wire, another strengthens it, a third cuts it, a fourth points it, and a fifth gives it a head. Just to make the head requires two or three different operations. The work of making pins is divided into about eighteen different operations, which in some factories are all performed by different people, though in others the same man will sometimes perform two or three of them. Ten men, Smith said, in this way, turned out twelve pounds of pins a day or about 4,800 pins a worker. But if all of them had worked separately and independently without division of labor, they certainly could not have made twenty pins in a day and not even one. There can be no doubt that division of labor is an efficient way of organizing work. Fewer people can make more pins. Adam Smith saw this, but he also took it for granted that the division of labor is itself responsible for economic growth and development and it accounts for the difference between expanding economies and those that stand still. In fact, the division of labor adds nothing new, and it only enables people to produce more of what they already have. Question: Adam Smith mentioned the number 4,800 in order to _ . - show the advantages of the old labor system - stress how powerful the individual worker was - show the advantages of the division of labor - stress the importance of increasing production
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show the advantages of the division of labor

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Read the following article and select the best answer. Article: In Japan's capital city of Tokyo, earthquake danger limits the height of buildings. The city has spread out so far and the traffic has become so heavy that it is very difficult to go from one place to another. The price of the land, too, has skyrocketed. All these explains why a group of Japanese land developers came to the conclusion that there was nowhere to go but down. So far they have dug out space underground for fifteen shopping centres. What are some of the advantages of shopping and eating underground? Clean air is one of them. The city of Tokyo has one of the most serious smog problems in the world. Another advantage is that you escape the ever-present threat of traffic accidents on the city's busy streets. Still another is the convenience of getting around: you are usually right next to, or even in, a subway station. And you can even spend the night underground if you like. The Kibosh station, for example, in downtown Tokyo, has a hotel with a bar, restaurant, and barbershop. Question: The passage mainly tells us _ . - the capital of Japan - the land and its limits - the use of space underground in Tokyo - how to make full use of the land
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the use of space underground in Tokyo