678+2456+986=( )
根据句意及首字母或汉语提示完成单词
例:A:Jenny often walks to school.
B:Jenny walked to school yesterday.
C:Jenny is going to walk to school tomorrow.
选字填空。
诲 悔
①我会牢记老师的教____的。
②对以前的事,他感到很后____。