Read the following article and select the best answer. Article: Even plants can run a fever, especially when they're under attack by insects or disease. But unlike human, plants can have their temperature taken from 3,000 feet away--straight up. A decade ago, adopting the infrared scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest problems. Even better, Paley's Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a colourcoded map showing where plants were running "fevers". Farmers could then spotspray, using 50 to 70 percent less pesticide than they otherwise would. The bad news is that Paley's company closed down in 1984, after only three years. Farmers resisted the new technology and longterm backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. "This technique can be used on 75 percent of agricultural land in the United States, " says George Oerther of Texas A & M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing which he failed to obtain 10 years ago. Question: Farmers can save a considerable amount of pesticide by _ . - resorting to spotspraying - transforming poisoned rain - consulting infrared scanning experts - detecting crop problems at an early stage
resorting to spotspraying

Read the following article and select the best answer. Article: Ordering from BookFirst is easy and safe. SELECTING YOUR BOOKS When you have found a book you would like to order, just click on Add to Basket and it will be added to your shopping basket. To make it easy to keep track of the books you've selected, My Shopping Basket will display your choices wherever you are on the site. When you're ready to place your order, select View Basket. VIEW BASKET This is where you select the postal destination for your order, indicate whether you would like Next Day Delivery in the prefix = st1 /UKand choose gift-wrapping. You can also modify. the contents of your basket by making any changes then selecting Update Basket. Overseas customers ordering three or more books can also request reduced airmail charges here. When you're happy with the contents of your shopping basket, go to the Secure Checkout. THE ORDER FORM After you've completed the order form, you will receive an on-screen acknowledgement. This will be followed by an email confirming the details of your order. We will then inform you when your order has been sent. If this is your first order, we will also inform you of your personal BookFirst account number. RETURNING CUSTOMERS If you have ordered from us before, online, by mail or telephone, you will have already owned a personal account number. You then only need to complete the full order form. Using your account number allows us to find your details from our records (they are not accessible online). Question: The purpose of this advertisement is _ . - to promote the sale of books. - to show the ways of ordering - to help readers apply for account numbers - to supply account numbers to readers
to show the ways of ordering

Read the following article and select the best answer. Article: "What's in a name?" According to Shakespeare's Romeo and Juliet, there is not too much. "That which we call a rose by any other name would smell as sweet." But Shakespeare may have been wrong. In most cultures, names matter a great deal. Americans choose names for their children with care. Parents usually think about the impression a name gives, not its meaning. Most Americans would consider a "Jennifer" more attractive than a "Bertha", for example. The last name, or, surname, must also be considered when choosing a first and middle name. A name like Lester Chester Hester would sound poetic, but odd. Parents would avoid names that remind them of people they don't like. On the other hand, people might name their children after a respected elderly or even a famous person. The popularity of certain names can change with each new generation. Names that were once common, like Fanny or Elmer, sound old-fashioned today. But other names---like John and David, Mary and Sarah---have stood the test of time and continue to be favorites. People in America don't always call their friends and s by their given names. Instead, they often use nicknames. Sometimes nicknames are short forms of a longer name. For instance, a girl named Elizabeth may be called Lisa, Beth or Betsy. As children grow up, they may decide for themselves which nickname they wish to be called. Some people just go by the initials of their first and middle names, like B.J. or R.C. And of course, people may call their children or their sweethearts other special nicknames. Often they have a "sweet" flavor, like Honey or Sugar. What's in a name? A word of significance. So if you're choosing an English name for yourself, take care to choose a good one. A made-up name could sound strange to native English speakers. And a translation of your Chinese name may not make an appropriate name, either. But a good name can leave a positive and lasting impression. As an American politician once said, "In real life, unlike in Shakespeare, the sweetness of the rose... Question: What is the main idea of this passage? - Names have great significance to Americans. - Names change when time goes by. - Chinese people should be careful when choosing their English names. - Roses smell sweet by any other name.
Roses smell sweet by any other name.