—Why are the two students standing at the gate of the teachers'office?

—They________to each other in class and________.[ ]

A. have whispered; are punishing

B. had whispered; were punished

C. whispered; are being punished

D. are whispering; were being punished

女性，65岁，腹胀痛，腹泻便秘交替月余伴里急后重感，无鲜血便。体格检查：腹平软，未及包块，左锁骨上，腹股沟淋巴结未触及

此病人主要的治疗应采取（）

A.肠造瘘术

B.根治性切除术

C.化学治疗

D.放射治疗

E.免疫治疗