Cancer is second only to heart disease as cause of death.A. the; a B. /; aC. a; a D. the

问题补充：

Cancer is second only to heart disease as cause of death.

A. the; a

B. /; a

C. a; a

D. the; the

答案：

A. the; a

(答案→)B. /; a

C. a; a

D. the; the

解析：B 考察冠词，句义：癌症是仅次于心脏病的死亡杀手。第一空是固定搭配,second to..仅次于…；第二空表示泛指。