◎ 题干
Being physically examined for free twice a year is what every clerk _____ be ensured in any company of the
state.
[     ]
A. must
B. shall
C. ought to
D. need
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Being physically examined for free twice a year is what every clerk _____ be ensured in any company of the state.[ ]A. must B. shall C. ought toD. need …”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。