during=?or=?at once after=?三年前：_____ _____ _____ _____ _____

during=?or=?at once after=?三年前：_____ _____ _____ _____ _____ 当然英语翻译_____=_____=_____ by himself=_____ _____ _____ 1、keep healthy=_____ _____ _____ _____ %>_____ _____, once a week=_____ _____ a month finally=_____ ____=_____ ____ _____ a little Chinese = _____ _____ _____ of Chi 活泼金属单质+酸=_____+_____...... Don't forget to =_____ _____ go shopping=do _____ _____