Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
At that time they believed that the only known （ ）for radiation sickness was rest. (treat)
【正确答案】：TREATMENT
【题目解析】：
那时候他们认为唯一已知的治疗辐射病的方法是休息。treatment疗法，名词。