“Although we were very optimistic, we were not expecting to see 100 percent survival of Ebolainfected monkeys, when they are treated only three days before they die of the disease on average,” Qiu said. “This study shows that what seems impossible for many to develop a cure capable(有能力的) of stopping Ebola virus only a few days before death, has now been made and proven to be effective,” she added.

　　41. Ebola virus is considered as one of the most dangerous viruses because _______.

　　A. people get infected easily

　　B. it doesn’t show any symptoms

　　C. it can kill a person in a week

　　D. few people do study about it

　　42. According to Paragraph 4, the interferon-alpha can ______.

　　A. enter into inner part of the virus

　　B. kill the Ebola virus immediately

　　C. stop the Ebola virus from reproducing

　　D. help improve the defense of the infected

　　43. What can be inferred from the text?

　　A. The new antibodies can effectively destroy Ebola virus.

　　B. The infected person usually dies if symptoms have become clear.

　　C. Interferon-alpha is more useful than the three specific antibodies.

　　D. Ebola virus mainly spreads through contact with infected monkeys.

　　44. Which of the following is TRUE about the study?

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