Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Continuous exposure to sound above 80 decibels could be （ ）. (harm)
【正确答案】：HARMFUL
【题目解析】：
根据前文exposure···could be（暴露在······可能是）说明空格处应该填harm的形容词形式harmful有害的，符合句意。
句意：持续暴露在80分贝以上的声音中可能会造成损害。