Bananas are one of the world' s most important food crops. They are also one of the most valuable exports. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease because all the plants on a farm are copies of each other. They all share the same genetic weaknesses. For example, the Cavendish banana is most popular in North American and European markets. However,some kinds of fungus organisms easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plant' s leaves. Farmers put anti-fungal chemicals on their crops up to once a week. Another fungal disease is more serious. Panama disease attacks the roots of the banana plant. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America. The International Network for the Improvement of Banana and Plantain supports research on bananas. The group has headquarters in France and other offices in the major banana-growing areas of the world. The group says that more research must be done to develop improved kinds of bananas. The group says that fungal diseases mainly affect only one kind of banana. In fact, there are five hundred different kinds of bananas. Food and Agriculture Organization of the United Nations has said that the Cavendish banana represents only 10% of world production. The U.N. agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease. According to the passage, which information is right? A) The Cavendish banana can mainly be imported from North America and Europe. B) Panama disease affects the leaves of Cavendish banana plants. C) The Cavendish banana won't die out in the future. D) The Cavendish banana makes up only one tenth of world production.
D
(Question)
A deadly strain of avian flu may have passed between people for the first time, experts believe.The avian influenza A (H7N9) virus is thought to have been transmitted between father and daughter in eastern China, according to research published online by the British Medical Journal (BMJ). The findings provide the strongest evidence yet of H7N9 transmission between humans since its discover in February, but its ability to transmit itself _ "limited and non-sustainable" by the Chinese researchers behind the study.At the end of June 133 cases had been reported, including 43 deaths. Most infections have been among people visiting markets, selling live birds or among those who had contact with live poultry in the seven to 10 days before becoming ill. The latest study examined the case of a 60-year-old father who regularly visited a live poultry market and became ill five to six days after his last visit in March. He was admitted to hospital with fever, cough and shortness of breath. Despite intensive care treatment he died of multiple organ failure on 4 May. His 32-year-old daughter, who was previously healthy, looked after him at his bedside before he was admitted to intensive care. She had no known exposure to live poultry before falling ill with a very high temperature, cough and fever. The daughter developed symptoms six days after her last contact with her father and was admitted to hospital where she died of multiple organ failure on 24 April. Follow-up investigations uncovered almost genetically identical virus strains from each patient, suggesting transmission from father to daughter. Another 43 people were also tested who had had close contact with the father, daughter or both. Dr Peter Horby, senior clinical research fellow at the Oxford University Clinical Research Unit in Hanoi, Vietnam, said of the study: "The most likely source of infection for the daughter was her father, during the period that she cared for him while he was ill. "He said "limited person to person transmission had been reported... Which of the following is Wrong about H7N9 transmission? A) It was limited and non-sustainable B) It was person to person transmission C) It wasn't progressed any further down the path towards a world-wide virus. D) It happened between father and daughter .
(Answer)
D
Ques:Is it possible that the sinking of the Titanic was caused by a ghost? A plot of the story below is true ... but did it really happen quite like this? Our story begins not in the icy cold waters of the North Atlantic, but rather thousands of miles away in Egypt. It is here, perhaps, that we can find the start of the mystery of the Titanic, in the year 1910, in the great city of Cairo. One day, a famous professor of Egyptian history called Douglas Murray was staying in Cairo, when he was contacted by an American adventurer. The American had something unusual to offer Murray, something that was certain to thrill him: a beautiful ancient Egyptian mummy case, containing the mummy of an Egyptian queen. It was over 3,000 years old, but in beautiful condition -- gold, with bright paintings on it. Murray was delighted with both the object and the askingprice. He gave the man a cheque immediately. The cheque was never cashed. That evening the American adventurer died. For his part, Murray arranged to have the treasure sent back to Britain. However, it was not long before he learnt more about the beautiful mummy case: On the walls of the tomb in which it had been discovered, there were messages which warned of terrible consequences to anyone who broke into the tomb. Murray was disbelieving of these warnings until a few days later, when a gun he was holding exploded in his hand, shattering his arm. The arm had to be cut off. After the accident, Murray decided to return to his homeland. On the return journey, two of his companions died mysteriously, and two servants who had handled the mummy also passed away. The nowterrified Murray decided he would get rid of the _ case as soon as he arrived in London. A lady he knew named Janet Jones said she would like it, so he gave it to her. Shortly afterwards, Jones' mother died, and she herself caught a strange disease. She tried returning the mummy, but naturally Murray refused it. In the end, it was presented to the British Museum. Even in the museum, the mummy apparently... What is the main purpose of this passage? A) To entertain readers with a story of mystery. B) To introduce an important historical event to readers. C) To warn readers about the dangers of mummies' curses. D) To inform readers about the true cause of the Titanic's sinking.

Ans:
A