Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
He had a headache and had to take some （ ）(pain, kill)
【正确答案】：PAINKILLERS
【题目解析】：
本题考查的是常见单词的复合名词。
由some可知，空缺处应填名词作宾语，pain“疼痛”和kill可组成名词painkiller意为“止痛药”，为可数名词，需用复数形式painkillers。
句意：他头痛的厉害不得不吃点止痛药。