单选题Though the long term ______ can't be predicted, the plan has been approved by the boss. A) affect C) afford B) effect D) effort

单选题In America, colleges usually take new students according to ______.

单选题The passage is mainly about CIDA' s advice on ______.

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单选题______ the rule will be abolished or not hasn"t been made public.

单选题The heart is an important organ of circulation ______ function is to pump blood to all parts of the body. A. which B. whose C. of it D. its

单选题______ electronic computers being used, the complicated problem was solved quickly and accurately. A. With B. As for C. By D. Since

单选题The material for the dream you will have tonight is likely to come from the experience you have today.

单选题People are coming to understand that easy access to ______ is often the key to success in this highly developed society. A. information B. the information C. an information D. informations

单选题The word "that" in Line 3, Para. 4 mostly probably means ______. A) becoming a volunteer C) having relatives B) donating blood D) saving people's life

单选题Because humans are at the top of the food chain, they are particularly vulnerable to the effects of nondegradable (不可能降解的)pollutants. This was clearly illustrated in the 1950s and 1960s when residents living near Minamata Bay, Japan, developed nervous disorders, shaking, and paralysis(瘫痪，麻痹) in a mysterious widespread. Over 400 people died before authorities discovered that a local industry had released mercury(水银，汞) into Minamata Bay. This highly toxic element stored up in the bodies of local fish and eventually in the bodies of people who consumed the fish. More recently research has revealed that many chemical pollutants are harmful to the human beings. Pollution also has a dramatic effect on natural resources. Ecosystems such as forests, wetlands, and rivers perform many important services for the earth"s environment. They improve water and air quality, provide living places for plants and animals, and provide food and medicines. Any or all of these ecosystem functions may be impaired or destroyed by pollution. Moreover, because of the complex relationships among the many types of organisms and ecosystems, environmental pollution may have far-reaching consequences that are not immediately obvious or that are difficult to predict. For instance, scientists can only point out some of the potential impacts of the decrease of the ozone layer(臭氧层), the protective layer in the atmosphere that shields the earth from the sun"s harmful rays.

单选题An average of 82.4% of domestic travelers went on sightseeing tours during this year, an increase of 8.7% compared with the previous year.

单选题At that time I had no idea ______ I could hand it to him without being seen.

单选题In this hotel there are a number of rooms ______ windows face the beach.

单选题Your article will have to be ______ to fit into the magazine.

单选题As it is，they can hardly get to the station by 6 o'clock．

单选题If ______ successfully, the plan will completely change the traffic conditions in the city. A. carrying out B. carried out C. to carry to D. carry out

单选题People, a magazine featuring the lives of famous people, recently revealed the 50 prettiest celebrities worldwide.A. 专门报道名人生活的《人物》杂志最近公布了世界上最美丽的50位名人。B. 人们最近在一份专门报道名人生活的杂志上，揭示了最近一段世界内世上最美丽的50个人。C. 《人物》杂志和另一本专门报道名人生活的杂志，公布了世上最近以来最美丽的50个名人。D. 最近一份专门报道名人生活的《人物》杂志揭示了世上最美丽的50位名人。

单选题The reporter said that the UFO was traveling east to west when he saw it.

单选题Activities like these are called " living history", and have become increasingly popular in recent years. A. 人们称这种活动为“活历史”，而且近年来，这种活动越来越流行。 B. 这种活动被称为“活历史”，而且越来越流行。 C. 最近越来越流行的这种活动叫做“活历史”。 D. 活动像这样称为“活历史”，并且近年来增加了许多。 E. 这些叫做“活历史”的活动越来越多了。