that变数形式（ ）

that变数形式（ ）
选择：“What is are your brothers?"
" _______."
A.He is at home B.He is in his room C.Yes,they are D.I do not know.
3.选择："What is under the desk?"
" _______."
A.It is a baseball. B.I can see a set of keys C.They are red boxes D.Ineed a hat
4._____your father and mother at home?
A.Are B.Is C.Do D.Can
5.-----______,Li Yi!Is this radio yours?
-----No,it is not.I think it his.
6.Is it on the floor,_____my bed?No.It is in my brother's room.I have a nice dictionary.It is ___the table and the bed.

A.in B.under C.between D.at
(第六题横线处填A,B,C,D可以重复）