单选题While his efforts were tremendous the results appeared to be very ______. A. trigger B. meager C. vigor D. linger

单选题Science has made great______ during the past 20 years.

单选题The step was announced by the secretary of state in person and given maximum______

单选题Customer service stands out as the area where WestNet falls most behind, with 43.8 percent of its users in the survey saying "its security does not come______".

单选题The soldiers who______ from the army were severely punished.

单选题I hope that you'll be more careful in typing the letter. Don't______anything. A. lack B. withdraw C. omit D. leak

单选题Sometimes a dictionary designates a noun as attributive, which means that it can be used to describe another noun or name its attributes. A. conveys B. defines C. indicates D. explains

单选题The nation-wide economic slowdown worsened the ______ between employer and employee.

单选题He ______ his lesson about France with photographs of the people who live there.

单选题It has been proposed by many linguists that human language______,our biologically programmed abilith to use language, is still not well defined and understood.

单选题What do you think Alison said to herself when she saw the dog?

单选题In the early 20th century, at the Uadvent/U of the telephone, it was considered a superfluous instrument which would never be of practical use in the average household.

单选题I must have hung ______ for ten minutes before the telephone operator put me through.

单选题What is true of the present state of the Philippoteaux’s Gettysburg rendering?

单选题Fifty is the gateway to the most liberating passage in a woman's life. Children are making test flights out of the nest. Parents are expected to be roaming in their recreational vehicles or sending postcards of themselves riding camels. Free at last! Women can graduate from the precarious balancing act between parenting and pursuit of a career. That has been the message of my books since I wrote New Passages 15 years ago. What I didn't see coming was the boomerang. With parents living routinely into their 90s, a second round of caregiving has become a predictable crisis for women in midlife. Nearly 50 million Americans are taking care of an adult who used to be independent. Yes, men represent about one third of family caregivers, but their participation is often at a distance and administrative. Women do most of the hands-on care. It starts with the call. It's a call about a fall. Your morn has had a stroke. Or it's a call about your dad—he's run a red light and hit someone, again, but how are you ever going to persuade him to stop driving? Or your husband's doctor calls with news that your partner is reluctant to tell you. it's cancer. When that call came to me, I froze. The shock plunges you into a whirlpool of fear, denial, and feverish action. You search out doctors. They don't agree on the diagnosis. You scavenge the Internet. The side effects make you worry. You call your brother or sister, hoping for help. Old rivalries flare up. We'd like to think that siblings would be natural allies when parents falter. But the facts are quite different. Brothers bury their heads in the sand. The farther away a sister lives, the more certain she will call the primary caregiver and tell her she doesn't know what she's doing. A 1996 study by Cornell and Louisiana State universities concluded that siblings are not just inherent rivals, but the greatest source of stress between human beings. There are many rewards in giving back to a loved one. And the short-term stress of mobilizing against the initial crisis jump-starts the body's positive responses. But this role is not a short race. It usually turns into a marathon, averaging almost five years. But most solitary caregivers will wait until the third or fourth year before sending out the desperate cry "I can't do this anymore!/

单选题Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the water is too acid, the gill systems of many kinds of fish can be damaged. 1 , the acid alters the blood chemistry of all fish. As a result, the fish population in an acidic environment decreases 2 becomes extinct. Approximately 20 percent of the lakes in Scandinavia are without fish. Moreover, in Nova Scotia the 3 salmon industry may be threatened by the decrease of salmon in rivers and streams. The impact is also 4 in the waters of Ontario and Quebec, where fish populations are (25) the decline. What potential remedies exist for the acid rain 5 ? The experts disagree. Some say new environmental laws should be 6 to control the emission of pollutants in the atmosphere. Some say that if we had known how serious acid rain was, we would have planned 7 to prevent it. 8 , all agree that if the consumption of fossil fuel were reduced, we would have less of a problem. Another 9 is that special scrubbers could be installed in smokestacks to remove a good 10 of the pollutants before they get into the atmosphere. Other ideas even include breeding more 11 fish. And research suggests that spreading lime into lakes may be effective in 12 acidity. In conclusion, it is clear that if we truly want to reduce the impact of acid rain, a 13 of remedies and international cooperation must be explored. It is a sad fact that acid rain probably could have been avoided if we 14 what we know now.

单选题{{B}}Directions:{{/B}} There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C, and D. You should decide on the best choice and mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets. One of the youngest independent countries in the Western Hemisphere, Trinidad and Tobago, became a nation on August 31, 1962. For a long time this nation has attracted tourists--it is the home of calypso music and limbo dancing--and in recent years its healthy economy has attracted investors as well. Trinidad and Tobago is a single country composed of two islands: Trinidad, with the majority of the country's 900,000 inhabitants, is a rectangle of roughly fifty by forty miles. Tobago, nineteen miles to the north, is smaller and has a population of about 35,000. Situated at the end of the long chain of Windward and Leeward Islands, Trinidad is at one point only seven miles off the coast of Venezuela. Its geology, flora, and fauna are similar to those of the South American mainland. Like Venezuela, the backbone of Trinidad and Tobago's economy is petroleum and its first colonists were Spaniards. Three mountain ranges, with summits of up to 3,000 feet, cross Trinidad from east to west, while Tobago is a relatively flat coral island, rimmed with fine beaches. The broad plains between Trinidad's mountain ranges are dominated by vast fields of sugar cane that present a symmetrical green pattern when seen from the air. A closer inspection reveals the coconut plantations along the coast and the profusion of brilliant red and yellow flowers of various species that are found all over the island. Houses on both islands tend to be light-colored, with an open style of architecture, in many cages with open space under the entire dwelling. Port-of-Spain, the capital, is a bustling modern city where the pulse of the people reflects Britist, Spanish, and East Indian influcnces.

单选题It seems that the author of this article ______.