将下列句子改成选择疑问句

问题描述:

将下列句子改成选择疑问句
1.Is Mary working?(加play改写)
________________________
2.Is Jim making cakes?(加bread改写)
________________________
3.Are they sleeping?(加talk改写)
________________________

1.Is Mary working or playing?
2.Is Jim making cakes or bread?
3.Are they sleeping or talking?