单选题How can he do so much work? He ______ stay late at the office every evening and take work home at weekends. A. must B. might C. can't D. would

单选题 中国城市急剧膨胀，大量农村人口移居城镇，使城市变得拥挤不堪。城市人口的迅速增长，将对公共卫生、淡水供应、医疗保健、食品供应、住房、交通和就业造成极大压力，并且带来一些恶性(Vicious)社会问题。同时，由于城镇发展，我们失去了肥沃的农田(fertile farmland)，日益恶化的空气质量和水质的污染使农作物受到损害。所有这些将使农业发展更加步履维艰。地球资源日益匮乏也是一个不容忽视的问题。看来解决人口激增的问题，是摆在现代人面前的一项艰巨而迫切的(pressing)任务。

单选题Can animals have a sense of humor? Sally Blanchard, publisher of a newsletter called the Pet Bird Report, thinks a pet parrot may have pulled her leg. That's one explanation for the time her African gray parrot, named Bongo Marie, seemed to feign distress at the possible death of an Amazon parrot named Paco. It happened one day when Blanchard was making Cornish game hen for dinner. As Blanchard lifted her knife, the African gray threw back its head and said, "Oh, no! Paco!" Trying not to laugh, Blanchard said, "That's not Paco," and showed Bongo Marie that the Amazon was alive and well. Mimicking a disappointed tone, Bongo Marie said, "Oh, no," and launched into a hoarse laugh. Was the parrot joking when it seemed to believe the other bird was a goner? Did Bongo Marie comprehend Blanchard's response? Studies of African grays have shown that they can understand the meaning of words--for example, that red refers to a color, not just a particular red object. Parrots also enjoy getting a reaction out of humans, and so, whether or not Bongo Marie's crocodile tears were intentional, the episode was thoroughly satisfying from the parrot's point of view.

单选题What feature sets apart the three dictionaries discussed in the passage from traditional ones ?

单选题______I ve seen how he lives, I know why he needs so much money.

单选题Which of the following is NOT mentioned in the passage as a function of electronics in television transmissions?

单选题The Great Wall is a great tourist ______ , drawing millions of visitors from all parts of the world every year.

单选题Children would play with fire until their hands were burnt away if______.

单选题Coconut椰子is an unusual food for many reasons.It is one of the largest edible seeds produced by any plant.Its unusual contents also make it unique in the seed world—it consists of both “meat“ and “wate

单选题 ________ how to solve the mathematics problem, Stephanie asked her teacher for help.

单选题The customs officer _____ him open his three suitcases.

单选题This matter should not be bushed up, but freely ______.

单选题It was sunrise on an August morning when the captain and his crew cast their nets some 50 miles south of Louisiana in the Gulf of Mexico. As the net was pulled over, the contents were poured out follo

单选题 《红楼梦》由曹雪芹所著。小说以贾氏家族为故事核心，描述了四大家族从富裕、有权有势沦为破落的过程。小说成功塑造了100多个经典人物，他们分属于清朝的不同阶层。《红楼梦》对中国的封建社会有深刻的描绘，如果想要了解中国人复杂的价值观，最好先能读懂《红楼梦》。毛主席认为《红楼梦》不仅是爱情故事，也是历史故事，因为它揭示了封建社会的衰败。

单选题 Asbestos exposure results in Mesothelioma, asbestosis and internal organ cancers, and ______ of these diseases is often decades after the initial exposure.

单选题Janehadn'tbeentoLondonbefore. __________ hadherhusband.

单选题If they think they are going to win over us by obstinately ______ and refusing to make the slightest concession, they are mistaken.

单选题Go and see for yourself, and you ______ what he said is true.