I on a sofa because my grandparents have e for 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：从题干中my grandparents have e for the weekend判断主句应用现在的时态，而且我只是因为祖父母来度周末临时睡沙发，所以选D，现在进行时表示临时性的动作。