Last Monday, I was asked to give the new students a test their English level.
A. grading
B. to grade
C. to have graded
D. having graded
网友回答
A. grading
(答案→)B. to grade
C. to have graded
D. having graded
解析：考查非谓语动词。句意：上周一，我被要求给新学生们一次测试，来给他们的英语水平划分等级。根据句意可知，这里表示目的，且表将来，应该用动词不定式，排除A、C、D；故选B。