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）