It is_______that all drivers install air bags at the front row for the minimum safety.

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问题 It is_______that all drivers install air bags at the front row for the minimum safety.

选项 A、decisive
B、active
C、imperative
D、regular

答案C

解析依照法律，司机安装安全气囊是“强制性的”事情。install前面省略了should，请记住这种用法。

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