i am () Room606.A:at ,B:on c:in D :behind

i am () Room606.A:at ,B:on c:in D :behind I am working hard ( ）French.A.at B.for C.in D.on I am _______ duty this week A.in B.at C.on D.for i am __ duty a.on b.in c.at d.to I am going to read a book _____ science.A.for B.on C.in D.at I am looking ___ my watch.A.for B.at C.to D.on I am ___ China now .A on B in C at I am _home _sunday morning.A.at,on B./,in C I am ( ) Row Five A.at B.or C.in D.and I am ___ school.(选择）A.at B.in C.and D.or(为什么?） The blackboard is ( ) the teacher.A.behind B.am C.in D.under 选择：I'm_____ holiday in Australia.A.in B.at C.on D.with