--- Do you often get on line?

--- Yes. I _____ most of my time _____ on it. It’s a good way to search for information.

A．cost; surfing

B．spend; surfing

C．pay; playing

D．take; playing

患者男性，62岁，发现右上牙龈菜花样肿物2个月，约1cm×2cm大小，活检报告“高分化鳞癌”。X线片示局部牙槽突骨质未见破坏，颌面颈部未触及肿大淋巴结。该患者最佳治疗方案为

A．病变区上颌骨区域性扩大切除十根治性颈淋巴清扫
B．病变区上颌骨区域性扩大切除十功能性颈淋巴清扫
C．病变区上颌骨区域性扩大切除，定期复查，密切注意颈部淋巴结情况
D．病变侧上颌骨次全切除十功能性颈淋巴清扫
E．病变侧上颌骨全切除十功能性颈淋巴清扫