Dave often _____ basketball after school.      [ ]

A. played

B. are playing

C. plays

D. will play

患者，男，60岁，主因腹胀，大便带有脓血2个月，查体：腹平、软，左腹部可及肿块。

病人的诊断为降结肠癌，手术切除范围为

A．降结肠及其系膜

B．横结肠左侧部、降结肠及其系膜及淋巴结

C．横结肠左侧部、降结肠、乙状结肠及系膜和淋巴结

D．降结肠、乙状结肠及其系膜

E．以上都不是