单选题Each has an apple, ______?

单选题 自驾游(self-driving tour)属于自助旅游的一种类型，是近年来我国新兴的旅游方式，以自由、灵活、富有个性化等突出特点被旅游者接受和喜爱。自驾游在选择目的地、参与旅程设计和体验自由等方面，给旅游者提供了极大的灵活性，与传统的参团旅游(group tour)相比具有自身的特点和魅力。随着自驾旅游者的增多，自驾游市场已经成形，越来越多的旅行社、汽车俱乐部、汽车租赁公司(car rental companies)看好这一市场，并涉足这一市场的开发。

单选题There isn't sound proof to support his biological theory.

单选题The colors of that coat and hat don't ______ .

单选题NASA is releasing several images taken by the Hubble Space Telescope, which is the closest yet look at the red planet. Altogether there are four images, which show the entire planet. Each view shows the planet as it completes one quarter of its daily rotation. In these views the north polar cap is turned toward the Earth and is clearly visible at the top of each picture. The images were taken in the middle of the Martian northern summer, when the polar cap was at its smallest size. During this season the sun shines continuously on the polar cap. Previous spacecraft observations have shown that this summertime polar cap is composed of water ice, just like Earth's polar caps. The Hubble Telescope pictures reveal that great changes have occurred on the surface of Mars in the past 20 years. The Martian surface is ever changing. Some regions that were dark 20 years ago are now bright red; some areas that were bright red are now dark. Winds move sand and dust from region to region, often in huge dust storms. Over long timescales many of the larger bright and dark markings remain stable, but smaller details come and go as they are covered and then uncovered by sand and dust.

单选题ADULTERATE: PURE

单选题I cannot tell the______difference between the twins.

单选题The fact that something is cheap doesn’t _________ mean it is of low quality.

单选题A good plan when fighting against an enemy tank is to ______.

单选题The results obtained agreed approximately with ______ expected. A. that B. one C. those D. ones

单选题Nelson is a creative liar who is always making __________ unusual excuses for not doing his work.

单选题Will you mind ______ him now ______ the next stop?

单选题What is the proper title for this passage?

单选题City officials are considering building a path to give the public ______ to the site. [A] recreation [B] excess [C] excursion [D] access

单选题Rain is not what it used to be. A new study reveals that much of the precipitation in Europe contains such high levels of dissolved pesticides that it could be illegal to supply it as drinking water. Studies in Switzerland have found that rain is laced with toxic levels of atrazine, alachlor and other commonly used crop sprays. "Drinking water standards are regularly exceeded in rain," says Stephan Muller, a chemist at the Swiss Federal Institute for Environmental Science and Technology in Dubendorf. The chemicals appear to have evaporated from fields and become part of the clouds. Both the European Union and Switzerland have set a limit of 100 nanograms for any particular pesticide in a liter of drinking water. But, especially in the first minutes of a heavy storm, rain can contain much more than that. In a study to be published by Muller and his colleague Thomas Bucheli in Analytical Chemistry this summer, one sample of rainwater contained almost 4000 nanograms per liter of 2, 4-dinitrophenol, a widely used pesticide. Previously, the authors had shown that in rain samples taken from 41 storms, nine contained more than 100 nanograms of atrazine per liter, one of them around 900 nanograms. In the latest study, the highest concentrations of pesticides turned up in the first rain after a long dry spell, particularly when local fields had recently been sprayed. Until now, scientists had assumed that the pesticides only infiltrated groundwater directly from fields. Muller warns that the growing practice of using rainwater that falls onto roofs to recharge under — ground water may be adding to the danger. This water often contains dissolved herbicides that had been added to roofing materials, such as bitumen sheets, to prevent vegetation growing. He suggests that the first flush of rain should be diverted into sewers to minimize the pollution of drinking water, which is not usually treated to remove these herbicides and pesticides.

单选题Scientists have spent years into the effects of certain chemicals on the human brain, but with no result. A. studying B. researching C. investigating D. inspecting

单选题The headquarters of this textile company is in New York while its 20______. companies are located in different parts of the world. A. parent B. subsidiary C. inferior D. ultimate

单选题The type of job an ape could do without supervision would be one which is ______.

单选题Lily: Have you lost weight? Mary:______

单选题The main point of paragraph 5 is ______.