People are advised to be towards the health concerns of their dear ones while burning firecrackers to celebrate the festival, for they contain harmful chemicals．
A. accessible
B. aware
C. cautious
D. sensitive
网友回答
A. accessible
B. aware
C. cautious
(答案→)D. sensitive
解析：形容词辨析。A可以进入的；B意识到；C谨慎的；D敏感的；句意：人们被建议当他们燃放烟花爆竹欢度节日的时候要对他们亲人的健康着想，因为烟花爆竹里含有有害物质。故D正确。