“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”

A．must; could

B．may; might

C．need; must

D．could; need

子宫内膜癌首选治疗方法是哪种

A．化疗
B．手术治疗
C．放射治疗
D．内分泌治疗
E．免疫治疗