This is s（） a.teachers'desk b.teacher desk c.t

This is s（） a.teachers'desk b.teacher desk c.t What's on （ ）desk?A.teachers B.teacher's C.the teacher's This is a big desk.It is ____the teacher.A.of B.for C.in D.t teacher's desk还是teachers' desk teacher's desk和teachers' desk under the ____ desk is a ball.A teacher B teacher's C teache is this a teacher,s desk?怎么作否定回答? Is this a teacher's desk?是神马意思? this a teacher,s deacher desk? On the teacher's desk _______some flowers.选择A.has,B.have,C.t Tom is standing ______the teacher's desk.A.with B.in C.besid This is a teacher's desk(改为一般疑问句,并作否定回答.）求教