You had better not leave the kids by .( they )at home急用

问题描述:

You had better not leave the kids by .( they )at home
急用

themselves
by oneself独自
你最好不要把孩子们单独留在家里

themselves

themselves
当主语和宾语为同一人或物时
用反身代词

themselves
leave one by oneself 把某人单独留下, 所以用反身代词,