英语同义句在线转换
问题描述：
英语同义句在线转换
The boys could carry the heavy bag upstairs by himself.同义句转换：The boys could carry the heavy bag _____ ______ ______
答
on his own艾玛我想知道为什么~提高悬赏~on one's own 和by oneself 都表示单独独自的意思