摘要：16．--- Have you handed in your papers? --- Yes, we have. I guess they now. A．have corrected B．are corrected C．are being corrected D．are correcting
网址：http://m.1010jiajiao.com/timu_id_2553608[举报]
— Have you handed in your papers?
—Yes, we have. I guess they ___________ now.
| A．have corrected | B．are corrected | C．are being corrected | D．are correcting |