单选题Researchers have discovered that dolphins are able to {{U}}mimic{{/U}} human speech.

单选题Many observers believe that country will remain in state of chaos if it fails to solve its chronic food shortage problem. A. transient B. starving C. continuous D. serial

单选题A century after the German-born scientist formulated his famous theory of relativity in Switzerland, and 50 years after his death on April 18, 1955, Einstein being reclaimed by the country he rejected.

单选题Freud was commonly regarded as great figure, whose name was ______ with psychoanalysis. A. nonaqueous B. synonumous C. prodigious D. proliferous

单选题People whose property is stolen should report to the police. A. had stolen B. is being stolen C. had been stolen D. has been stolen

单选题Leonardo was fined $150 by the magistrate and given a strong warning.

单选题Research should continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proved practical.

单选题If you carry this arrogant attitude to the conference, you will ______ any supporters you may have at this time. A. delight B. alienate C. defer D. attract

单选题The man we met this morning Ugrows/U many kinds of plants in his garden, most of which are flowers including succulents and cacti.

单选题It is a common knowledge that triangle has three angles, a square has four sides.

单选题David likes country life and has decided to ______ farming. A. go in for B. go back on C. go through with D. go along with

单选题Britain might still be part of France if it weren"t ______ a disastrous flood 200,000 years ago, according to scientists from Imperial College in London.

单选题Had I run out of gas, I ought to have called the garage.

单选题The fact that most Americans live in urban areas does not mean that they reside in the center of large cities. In fact, more Americans live in the suburbs of large metropolitan areas than in the cities themselves. The Bureau of the Census regards any area with more than 2,500 people as an urban area, and does not consider boundaries of cities and suburbs. According to the Bureau, the political boundaries are less significant than the social and economic relationships and the transportation and communication systems that integrate a locale. The term used by the Bureau for an integrated metropolis is an MSA, which stands for Metropolitan Statistical Area. In general, an MSA is any area that contains a city and its surrounding suburbs and has a total population of 50,000 or more. At the present time, the Bureau reports more than 280 MSAs, which together account for 75 percent of the US population. In addition, the Bureau recognizes 18 megapolises, that is, continuous adjacent metropolitan areas. One of the most obvious megapolises includes a chain of hundreds of cities and suburbs across 10 states on the East Coast from Massachusetts to Virginia, including Boston, New York, and Washington, D.C. In the Eastern Corridor, as it is called, a population of 45 million inhabitants is concentrated. Another megapolis that is growing rapidly is the California coast from San Francisco through Los Angeles to San Diego.

单选题While it is essential that the text covers the subject adequately, it is also important that it is neither too detailed or too complex for the intended reader.

单选题I came late to class today; the reason being that the bus broke down. A．today, and the reason being that B．today, for the reason being that C．today because D．today; due to

单选题Justices of the peace have jurisdiction over the trials of some civil suits and of criminal cases involving minor offenses. A. superiority B. authority C. guidance D. obedience

单选题The professor ______ upon his theory by giving detailed examples of applications.

单选题That boy is suffering from {{U}}unrequited{{/U}} love and pines away.

单选题The "appearances" at the end of the passage refer to ______.