(·北京东城二次联考)— you interrupt now？Can't you see I'm on the phone?—Sorry sir but it's urge

问题补充：

(·北京东城二次联考)— you interrupt now？Can you see Im on the phone?

—Sorry，sir，but its urgent.

A. Can

B. Should

C. Must

D. Would

答案：

A. Can

B. Should

(答案→)C. Must

D. Would

解析：——你非要现在打扰我吗？没看到我正在打电话吗？——对不起，先生，但事情紧急。must表示与说话人愿望相反或不耐烦“偏要，非得”，符合语境。