单选题Now listen to the following recording and answer questions 16 to 19.

单选题In junior high school, one of my classmates had a TV addiction—back before it was normal. This boy—we"ll call him Ethan—was an encyclopedia (百科全书) of meaningless content, from "The A-Team" to "Who"s the Boss?". Then one day Ethan"s mother made him a bold offer. If he could go a full month without watching any TV, she would give him $200. None of us thought he could do it. But Ethan quit TV, just like that. His friends offered to let him cheat at their houses on Friday nights. Ethan said no. One month later, Ethan"s morn paid him $200. He went out and bought a TV, the biggest one he could find. Since there have been children, there have been adults trying to get them to cooperate. The Bible repeatedly commands children to heed their parents and proposes that disobedient children be stoned to death or at least have their eyes picked out by birds. Over the centuries, the stick has lost favor, in most cases, to the carrot. Today the tiny bribes (贿赂)—a sticker for using the toilet or a cookie for sitting still in church—start before kids can speak in full sentences. In recent years, hundreds of schools have made these transactions more businesslike, experimenting with paying kids with cold, hard cash for showing up or getting good grades. I have not met a child who does not admire this trend. But it makes adults profoundly uncomfortable. Teachers complain that we are rewarding kids for doing what they should be doing of their own will. Psychologists warn that money can actually make kids perform worse by cheapening the act of learning. Parents predict widespread slacking after the incentives go away. The debate has become a battle for the larger war over why our kids are not learning at the rate they should be despite decades of reforms and budget increases. But all this time, there has been only one real question, particularly in America"s lowest-performing schools: Does it work? To find out, a Harvard economist did something education researchers almost never do: He ran a randomized experiment in hundreds of classrooms in multiple cities. He used mostly private money to pay 18000 kids a total of $6.3 million and brought in a team of researchers to help him analyze the effects. The result is that money is not enough. But for some kids, it may be part of the solution. In the end, we all want our children to grow into self-motivated adults. The question is, how do we help them get there?

单选题Various types of packaging come into existence to ______the market position of products.

单选题To prevent the spread of the epidemic, the public health organization carries out frequent ____________on the restaurants.

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单选题{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}}

单选题Does Emerson find his career full and _________ as a basketball player?

单选题My sister is quite ______ and plans to get an M. A. degree within one year.

单选题Susan has ________ the elbows of her son's jacket with leather patches to make it more durable.

单选题Many pure metals have little use because they are too soft , rust too easily, or have some other __________.

单选题New England Journal admonished doctors to ______.

单选题Questions 12 to 15 are based on the conversation you have just heard.

单选题 {{B}}Questions 26 to 28 are based on the passage you have just heard.{{/B}}

单选题As soon as the boy was able to earn his own living he ______ his parents" strict rules.

单选题Questions 30 to 32 are based on the passage you have just heard.

单选题With the reform in industry, Indian government is ______.

单选题The word "seductions" (Line 1, Para. 4) is closest in meaning to" ______ ".

单选题Which of the following statements is tale about descriptive statistics?