问题
选择题
—Have you got your exam papers?
—Not yet. I guess they _____ at this moment.
A．are being graded
B．are grading
C．have graded
D．have been graded
答案
答案：A
考查时态及语态。句意：你们拿到试卷了吗？还没呢，我猜它们此刻正在被评分呢。根据语境应用现在进行时的被动语态，所以选A。