today is my on duty .I help my teacher ( ) many things.A.in B.about C.with D.at .

is on duty today Today is my on duty for the day. who is on duty today what is on 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 whose turn is it ( ) on duty today 连词成句 turn it to is duty on my today be on duty today today is on my duty.thank you for you,i will try my best to do it啥意思 today is my on duty .I help my teacher ( ) many things.A.in B.about C.with D.at . who is ( ) duty today? whose turn is it-------（be） on duty today ____is on duty today?Li Lei is.怎么填? Today is my t___ for the moring traiffic duty on duty today 什么意思? whose on duty today改错 ( )on duty today?Wng Tao( )