A. They can only be used on smart phones.

　　B. Evermote and Wikipanion Plus are free.

　　C. Evermote can merely be used on a computer.

　　D. They improve learning efficiency and pleasure.

　　【答案】D

　　【解析】细节理解题。根据which can make your study more fun and efficient .阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

　　About a third of all common cancers in the United States, China and Britain could be prevented each year if people ate healthier food, drank less alcohol and exercised more, health experts said on Friday.

　　Reports from the World Cancer Research Fund (WCRF) suggest that making simple lifestyle changes could prevent some 40 percent of breast cancers alone in Britain and the United States, as well as tens of thousands of stomach cancers.

　　“Even in 2011, people are dying unnecessarily from cancers that could be prevented through keeping a healthy weight, diet, physical activity and other lifestyle factors,” said a WCRF medical and scientific adviser.

　　WCRF findings are supported by World Health Organization (WHO) reports, which say regular exercise can prevent many diseases such as cancers and heart diseases.

　　Cancer is a leading cause of death around the world and its incidence(发病率) is rising. Each year around 12.7 million people discover they have cancer and 7.6 million people die from some form of the disease. There are about 200 known types of cancer.

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