— Did Betty go shopping with you yesterday?

— Even if she _____ a lot of studying, she would have preferred staying home to going shopping. [ ]

A. didn't have

B. shouldn't have

C. hadn't had

D. hasn't had

术后病理证实双侧髂外淋巴结转移，应补充何种治疗：

A．免疫治疗

B．烷化剂化疗

C．红外线照射

D．抗癌抗生素

E．体外照射