问题
选择题
－Have you known the exam result?
－Not yet. I guess the paper ________ by the teacher now.
A．has graded
B．is graded
C．is being graded
D．is grading
答案
答案：C
题目分析：句意：--你知道考试结果了吗？--还没有，我猜试卷正在被老师批改。因为时间是now，而且paper和grade是被动关系，用现在进行时的被动语态，所以选C。