—Where is your mother? —She _____ becaus
问题:
—Where is your mother?
—She _____ because she is ill.[ ]
A. lies in the bed
B. lying in bed
C. is lying in bed
D. lies in bed
—Where is your mother?
—She _____ because she is ill.[ ]
A. lies in the bed
B. lying in bed
C. is lying in bed
D. lies in bed