单选题Can you leave your children at home alone? Yes, they can take care of_______ now.

单选题The museum's new building will have ______ the exhibition space as before, A. three times B. three times like C. three times as D. three times larger

单选题Bob said he would do what he could ______ you with your study.

单选题The chimney vomited a cloud of smoke.

单选题It is necessary______ the hook immediately.

单选题下面的短文后列出了10个句子，请根据短文的内容对每个句子作出判断：如果该句提的是正确信息，选择A；如果该句提供的是错误信息，选择B；如果该句的信息文中没有提及，选择C，并将所选答案的代码（指A、B或C）填在答题纸的相应位置上。Red Nose Day　　Red Nose Day （RND） is a well-known event in the UK.The aim of the clay is

单选题Both of the great and powerful groups of nations are alarmed by the steady spread of the ___________ atom. A. lethal B. fatal C. deadly D. mortal

单选题Africa's elephants are divided between the savannahs of eastern and southern Africa and the forests of central Africa. Some biologists reckon the forest ones-smaller, with shorter, straighter tusks-may even constitute a distinct species. But not for long, at the latest rate of poaching. The high price of ivory is increasing the incentive to kill elephants everywhere in Africa, and especially in places where there is virtually no law. The latest reports suggest that the forest elephant population is collapsing on the back of rising Chinese demand for ivory. Some conservationists argue that a recent decision by the Convention on International Trade in Endangered Species (CITES) to auction 108 tonnes of stockpiled ivory from southern Africa may be prompting more poaching in central and eastern Africa, as criminals seek to mix illicit ivory in with the legitimate kind. But some economists maintain that the legitimate sale of ivory lowers prices, thus decreasing the incentive to poach. A study of a previous sale of ivory suggested it did not lead to more intensive poaching. Either way, the Congo basin is " hemorrhaging elephants ", says TRAFFIC, which monitors trade in wildlife. The head of the 790,000-hectare (1,952,000-acre) Virunga National Park in eastern Congo, Emmanuel de Merode, reports that 24 elephants have been poached in his park so far this year. The situation is dire: 2,900 elephants roamed Virunga when Congo became independent in 1964,400 in 2006, and fewer than 200 today. Most have been poached by militias, particularly Hutu rebels from Rwanda who hack off the ivory and sell it to middlemen in Kinshasa, Congo's capital, who then smuggle it to China. Once ivory has left its country of origin, and if it is not seized by customs officials, it can be hard to identify its source and those responsible for acquiring it. But forensic help may be at hand. Scientists from the University of Washington are using genetic markers in elephant dung to identify exactly where ivory has been poached. This should help governments in countries such as Tanzania and Zambia, which are capable of catching poachers, but not in anarchic eastern Congo, where 120-odd rangers have been killed in Virunga in recent years trying to protect elephants and gorillas. With an influx of businessmen and other officials from China engaged in infrastructure projects such as road building and logging, the slaughter is expected to accelerate. Forest elephants may survive in large numbers only in remote protected pockets of the Congo basin, such as the Odzala-Koukoua National Park in Congo-Brazzaville and Minkebe National Park in northeast Gabon.

单选题 The following account by the author ______ the difference between European and American reactions.

单选题For generations，the Nganyi people of western Kenya have served as rainmarkers，helping local communities decide when best to prepare their land and SOW their seeds.By observing subtle changes in nature

单选题It would be unwise to______too much importance to these opinion polls.

单选题Hitler sought to {{U}}annihilate{{/U}} resistance movements throughout Europe.

单选题 Which of the following sentences does NOT indicate certainty?

单选题The manager promised to keep me ______ of how our business was going on. A. informed B. informing C. to be informed D. having informed

单选题The editors said they must report to the world how Beijing has ______ pollution and improved the quality of the environment.

单选题One car went too fast and ______ missed hitting another car.