Who is ( )duty I am.A.in B.on c.of d.for
Who is ( )duty I am.A.in B.on c.of d.for
I am _______ duty this week A.in B.at C.on D.for
i am __ duty a.on b.in c.at d.to
单选:Who's ( ) duty todoy?A.in B.at C.on D.to
I think Ann must____on duty today A.be B.is C.are D.am
Who is the boy_______black?_Jack A on B in C for D with
who is __duty today? A in B on C at D for
I am working hard ( )French.A.at B.for C.in D.on
I will be back ( ) a moment.A of B in C on D for
The boy ___green is Bob A:in B:on C:of D:for
--Where is my bag?--It's_____ten floor.A.in B.of C.on D.for
I am going to read a book _____ science.A.for B.on C.in D.at