Who's at duty today?I am哪里错了

Who ’s ( ) duty today?on?at?in?from? Who's at duty today?I am哪里错了 填空：Who’s--------duty today Who' s ______ duty today? who is ( ) duty today? 找错：Who is at duty today?I am. Who is at duty today?哪儿错了/ Who's on duty today.的中文意思是什么啊 who's on duty today翻译成汉语 who is on duty today Who is ___ duty today? Who is on duty today?为什么用on duty Who is on duty today ?是什么意思 谢谢 填介词； (1) Who's ( ) duty today? (2) I think Chinese food is different ( ) western food. who is on duty today怎么回答要正确完整答案回答It's me.可以吗 who be on duty today. 适当形式 理由 who＿＿＿（be）on duty today? l'm at school and it's my turn to be on duty today的意思是什么