Usually the teachers will be busy the test papers after an examination.
A. grading
B. naming
C. ranking
D. grouping
网友回答
(答案→)A. grading
B. naming
C. ranking
D. grouping
解析：本题考查动词。be busy doing something 为固定句型，忙于做某事，grand意为“给……评分”。句意：考试之后，老师通常忙于给测试卷评分。