【题目】The teacher always tells us to stay ________ and obey the guidance if we hear the fire alarm.
A. quiet B. peaceful C. silent D. calm
在线课程【答案】D
【解析】
试题分析：A. quiet安静；B. peaceful 和平的；C. silent 沉默；D. calm镇静。句意：老师总是告诉我们如果遇到火警要保持镇静听从指挥。stay calm保持镇静。故选D.