He________his leg when he________in a football match against another school.

A．broke；played

B．has broken；was playing

C．broke；was playing

D．broke；had played

治疗休克的关键措施是（）

A.积极处理原发疾病

B.补充血容量

C.纠正酸碱平衡失调

D.应用血管扩张药物

E.使用皮质激素