Who will be on duty at six?——I will.如果是Who was on duty at si

who is on duty today 英语选择题-Who will be __ duty tomorrow?-Susan will. Who is on duty today?为什么用on duty 单选:Who's ( ) duty todoy?A.in B.at C.on D.to who＿＿＿（be）on duty today? who be on duty today. 适当形式 理由 Who ___(be）on duty today Li Ming and I ___(be). Who's at duty today?I am哪里错了 找错：Who is at duty today?I am. Who is on duty today ?是什么意思 谢谢 who is on duty today怎么回答 will you be on duty this week or next week?