麦、稻收割后，人们把麦秆、稻秆留下作为柴草备用。麦秆、稻秆能燃烧，是因其中含有

A．光能

B．二氧化碳

C．氧

D．有机物

This is _____ mother, and _____ name is Mary. [ ]

A. her; his

B. my; her

C. your; his

D his, his