5.―Have you handed in your schoolwork yet?
―Yes，I have. I guess it now.
A. has graded
B. is graded
C. is being graded
D. is grading
网友回答
A. has graded
B. is graded
(答案→)C. is being graded
D. is grading
解析：now暗示该空表示“现在正在被打分”，因此应填现在进行时被动语态动词形式is being graded。