I on a sofa because my grandparents have been here to spend the weekend.
A. slept
B. was sleeping
C. have slept
D. am sleeping
网友回答
A. slept
B. was sleeping
C. have slept
(答案→)D. am sleeping
解析：句意：我现在在沙发上睡觉，因为我祖父母一直在这儿度周末。从because my grandparents have been here to spend the weekend.可知是现阶段正在做…，或暂时做…，用现在进行时，所以选D。