who will be our class teacher next term do you know
问题描述：
who will be our class teacher next term do you know
do you know --------- ------------ be our class teacher next term
答
do you know ----who----- ---will--------- be our class teacher next term什么时候连接词用if/whether是否 的意思时，如I don't know if it is right.我不知道它是否是对的。