题目
---Why doesn't the surgeon stop ____________ lunch？
---Because he is too busy __________ a dying patient in the operation room.（ ）
---Because he is too busy __________ a dying patient in the operation room.（ ）
A.
to have；to save
B.
having；to save
C.
to have；saving
D.
having；saving
知识点：动词不定式,实义动词章节：未标注