优优班--学霸训练营 > 题目详情
  • As we all know, ______ life is hard for any of us. If we want to live ______ happy life, we must work harder.

    A. 不填; 不填
    B. 不填; a      
    C. a; 不填         
    D. a; a
    【考点】零冠词,不定冠词
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    【解答】请登陆后查看
    难度：较易
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