5678七年级英语：根据各题后括号内的要求改写下列句子,每空一词（含缩略形式）.
5.Those are oranges.(改为一般疑问句)
_______ _______ oranges?
6.These are Lucy’s maps.(改为单数句 )
_______ ________ Lucy’s _______.
7.That is a ruler.(改为复数句)
________ ________ ________.
8.They are my father and mother.(对划线部分提问)用my father and mother提问
________ ________ they?