【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

【答案】D
【解析】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。A. quiet”安静“；B. peaceful ”和平的“；C. silent ”沉默“；D. calm”镇静“。stay calm固定短语”保持镇静“。故选D。