－Have you known the exam result?
－Not yet. I guess the paper ________ by the teacher now.
A．has gradedB．is gradedC．is being gradedD．is grading
C

試題分析：句意：--你知道考試結(jié)果了嗎？--還沒有，我猜試卷正在被老師批改。因為時間是now，而且paper和grade是被動關(guān)系，用現(xiàn)在進行時的被動語態(tài)，所以選C。
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