_____ the employees' working efficiency, the supervisor will allow them to have a coffee break. [ ]

A. Improving

B. To improve

C. Having improved

D. Improved

下列句中加粗词的解释有误的一项是[ ]

A．乃瞻衡宇，载欣载奔——载……载：一边……一边。

B．请息交以绝游——绝：断绝。

C．审容膝之易安——审：仔细。

D．曷不委心任去留——任：随，顺从。