Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
All skills require constant （ ）to become second nature; good manners are no exception. (repeat)
【正确答案】：REPETITION
【题目解析】：
所有的技能都需要不断的重复才能成为第二天性；好的礼节也不例外。repetition重复，名词。
