It is extremely important to keep ______in the event of pneumonia.
It is extremely important to keep ______in the event of pneumonia.
A、calmly
B、calm
C、calming
D、calmness
【正确答案】：B
【题目解析】：考查Conversion（转化法）。Calm形容词兼动词，形容词：镇静的，沉着的，风平浪静的，无风的；动词：使平静，使镇静。
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