练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情

    While other scientists are keeping____eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in ____humans.
    A．a , /B．an, /C．the, anD．an, the
    B
    考查冠词。句意“其它科学家正在密切观察H5N1流感病毒的变化，而英国的科学家正在致力于疫苗的研究，以防止出现病毒演变成对人类具有高传染性的危险。”keep an eye on sth.“注视......”；humans“人类”，前不用冠词。故选B。
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中英语 来源：不详 题型：单选题


    ________passenger plane crashed near Gazvin, Iran and all 168 people on________board were killed.
    A．A; aB．A; /C．The; theD．The; a

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题

    As is known to all, _______ strong and powerful China will certainly benefit _____ whole world.
    A．a; aB．the; aC．the; the D．a; the

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题


    His grandparents were born in ______ Qing Dynasty, while he was born in ______ 1920’s.
    A．a; anB．/;theC．the; the D．a; the

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题

    Robin makes______great effort to learn Japanese and he has made_____progress in it.
    A．a;aB．/;aC．the;/D．a;/

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题

    ---How did the accident happen?
    ---The car went out of___ control and rushed into___ truck ahead of it.
    A．/, theB．the. /C．the, theD．a, the

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题


    . When __ New Year’s Eve arrives, I can still remember the wonderful night in _______ winter of 2002.
    A．/; the B．a; the C．/; aD．the; the

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题


    ---- Which city will be        host city for the next Olympic Games? ?
    ---- London.?
    A．aB．/C．theD．an?

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：单选题


    It is believed that _____ European scientist invented _______.      
    A．an; a televisionB．a; a televisionC．an; the televisionD．a; the television

    查看答案和解析>>

    同步练习册答案