7 [单选题] The doctor couldn't explain the () of the high temperature.

A. persistent

B. persistence

C. persist

D. persisted

参考答案与解析：

相关试题

_______ the temperature falling so rapidly, we couldn't go on with the experiment.

_______ the temperature falling so rapidly, we couldnt go on with the experiment

  • 查看答案

    • ______ the temperature falling so rapidly，we couldn't go on with the experiment.（ ）

    ______ the temperature falling so rapidly，we couldnt go on with the experiment.（

  • 查看答案

    • But what if you lived there and couldn't chop (劈) wood or couldn't afford to pay someone to

    But what if you lived there and couldnt chop (劈) wood or couldnt afford to pay s

  • 查看答案

    • But what if you lived there and couldn't cut wood or couldn't afford to pay someone to do it

    But what if you lived there and couldnt cut wood or couldnt afford to pay someon

  • 查看答案

    • Each choice can be used only once. 58[单选题,1分] They all tried to talk _ , but I couldn't hear any

    Each choice can be used only once. 58[单选题,1分] They all tried to talk _ , but I c

  • 查看答案

    • （ ），we couldn't follow our usual schedule .

    （ ），we couldnt follow our usual schedule .A. Being the caseB. That being the cas

  • 查看答案

    • ______ that we couldn't catch up with him.

    ______ that we couldnt catch up with him.A. So fast he ranB. So fast did he runC

  • 查看答案

    • They couldn't hear her, as she spoke too _____ .

    They couldnt hear her, as she spoke too _____ .A. quietB. quieterC. quietly

  • 查看答案

    • The Sheraton couldn't offer            for all four of us.

    The Sheraton couldnt offer            for all four of us.A. a large enough roomB

  • 查看答案

    • There was so much noise that the speaker couldn't make himself().

    There was so much noise that the speaker couldnt make himself().A. heardB. heari

  • 查看答案