问题
选择题
I ________ on a sofa because my grandparents have been here for the weekend. [ ]
A . slept
B. was sleeping
C. have slept
D. am sleeping
答案
答案：D
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I ________ on a sofa because my grandparents have been here for the weekend. [ ]
A . slept
B. was sleeping
C. have slept
D. am sleeping
答案：D