(·重庆高考)— you interrupt now? Can't you see I'm on the phone?—Sorry Sir but it's urgent

问题补充：

(·重庆高考)— 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：选C考查情态动词的用法。句意：“你偏要现在打扰我吗？难道你没有看到我正在打电话吗？”“对不起，先生，但是情况太紧急了。”must表示“偏要，硬要”。故选C项。