—CanIhelpyou,sir?—Iamafraidyoucannot.Ihavemystudents’pa...

问题详情：

—Can I help you,sir?

—I am afraid you cannot.I have my students’papers _     .

A．to be graded                B．graded                                

grade                     D．grade

【回答】

C

知识点：非谓语动词

题型：选择题