问题
选择题
Usually the teachers will be busy ________ the test papers after an examination.
A．grading
B．naming
C．ranking
D．grouping
答案
答案：A
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。