2. 外语
  3. Tests have confirmed that four people in Wisconsin contracted the monkeypox virus after coming into close contact with pet prair

Tests have confirmed that four people in Wisconsin contracted the monkeypox virus after coming into close contact with pet prair

admin2012-02-18  111
问题     Tests have confirmed that four people in Wisconsin contracted the monkeypox virus after coming into close contact with pet prairie dogs, marking the【l】time the disease has been【2】in the Western Hemisphere. Fourteen more people in Wisconsin are【3】of suffering【4】the virus. Thirteen of them were around prairie dogs; the other【5】con-tracted it after handling a sick rabbit 【6】had been around a prairie dog. It doesn’t appear anyone contract the virus from another person.
    Monkeypox has caused an【7】of rashes, fevers and chills in people across the upper Midwest 【8】 early May. Monkeypox is a Virus infection that is【9】to smallpox. The virus has been found 【10】in west African nations and had never before been seen in Western Hemisphere. The outbreak【11】from a【12】of prairie dogs that came from a【13】distributors in suburban Chicago. It was there【14】the prairie dog may【15】infected【16】monkeypox by a Gambian rat—a rodent indigenous to African countries. The human death rate in Africa has【17】from 1 to 10 percent, but the virus may be【18】lethal in the United States, because people are typically better【19】and medical technol-ogy is【20】more advanced.
选项 A、since
B、before
C、after
D、in
答案A
解析 根据全句时态(完成时)判断，只有since符合结构。
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