自考英语专项练习题及答案（三）

单选题

1.【填句补文】Mexico's current lack of funds is also partly due to oil. The country has rich oil fields and a few years ago, when oil was expensive, Mexico was selling large quantities of oil to the USA and earning a lot of money. ________. However, the price of oil then dropped, and Mexico has been left owing enormous sums of money and with not enough income from oil sales to pay back the loans.

A.But those ruins are in danger of being seriously damaged by pollution.

B.Scientists estimate that about one millimeter of stone is worn away every twelve years.

C.At others the painted surfaces inside temples are lifting and flaking off and the stone is being eaten away.

D.The government was therefore able to borrow huge sums of money from banks around the world, thinking they would have no problem repaying their debts.

正确答案：D

答案解析：前文中说到，墨西哥把大量的石油卖给美国并获得很多的资金，therefore 引出了答案：墨西哥获得了大量的贷款。

2.【填句补文】More and more Americans are living alone. Some live alone because of divorce or the death of a partner. ________. According to a recent U.S. census (人口普查), 25 percent of all households in the U.S. are made up of just one person.

A.It seems that many grown-ups today are realizing that childhood dream.

B.He says, “I like being by myself.”

C.However, even more people are living alone because they have chosen to.

D.There’s more pressure to get married nowadays.

正确答案：C

答案解析：前句中是在对美国独身人中的具体情况进行介绍，而且提到了一些美国人独身leave alone的原因，这是一个线索词，判断C是答案，C中提到了更大多数美国人独身的原因。

3.【填句补文】The weather of the Caribbean Sea is almost always warm and sunny.Sandy beaches line the coasts of many islands. ________. Many tourists arrive on cruise ships.

A.They are Cuba，Puerto Rico，Jamaica，and Hispaniola.

B.The Caribbean Islands are known by several names.

C.Some of these islands are no more than tiny slivers(小片)of exposed coral.

D.This is why millions of tourists visit the islands each year.

正确答案：D

答案解析：最后一段讲到加勒比海的天气温暖，阳光充裕，许多岛屿的海岸有沙滩。这样的自然环境显然会吸引旅游者。因此D是正确的选择。这里也可以根据关键词tourists来解题。

4.【填句补文】Five-year-old Lani still takes seven medicines with her breakfast every morning. "She’s very good about it," says her father David. Lani is alive today because of her father David, in more than one way; when she was one year old she received part of her father’s liver in a liver—transplant operation. Lani was born with a liver illness. ________. Doctors advised that a transplant was the only way in which she would live.

A.She had one operation when she was six weeks old, which was not successful.

B.David quickly recovered from the operation.

C.David was finally able to ride his bike again after about a year.

D.Doctors hope that she will continue to get stronger and stronger.

正确答案：A

答案解析：文章说Lani出生时就有肝功能缺陷，她六周大的时候做过一次手术，但是没有成功，所以后边医生才会建议说她能活下来的唯一方法就是做移植手术。

5.【填句补文】Some 20，000 tons of antibiotics are used in the European Union and the US each year. More than half are give to farm-animals to prevent disease and promote growth. ________.

A.The warning comes from a researcher in Switzerland who looked at levels of the drugs in farm slurry.

B.The drugs could be getting into our food and water.

C.Many drugs given to humans are also excreted unchanged.

D.But recent research has found a direct link between the increased use of these farmyard drugs and the appearance of antibiotic-resistant bugs that infect people.

正确答案：D

答案解析：前两句讲的是抗生素在欧洲和美国的大量使用，这句讲的是由此导致的不良后果，接上去是最合理不过的。But明确地表明了这一转折。