1．His backpack is on the desk．（就划线部分提问）

_________ _________ his backpack?

2．Jack eats hamburgers for dinner．（变为否定问）

Jack _________ _________ hamburgers for dinner．

3．Her pants are white and bIack．（对划线部分提问）

_________ _________ are her pants?

4．My father plays ping-pong well．（变成一般疑问句）

_________ his father _________ ping-pong well?

5．This is all orange．（改为复数句子）

       ____________________________________?