(2013·吉林长春高中毕业班第一次调研)When the policeman stopped us, we all looked questioningly at him, ________.

A．nervously and puzzled

B．nervous and puzzling

C．nervous and puzzled

D．nervously and puzzling

患者出院后，床单位经终末消毒处理后应铺成备用床，以保持病室整洁。