--You just think of yourself! You kept me waiting for at least three hours．–I am sorry tha

问题补充：

--You just think of yourself! You kept me waiting for at least three hours．

–I am sorry that youthink so.

A. would

B. should

C. could

D. might

答案：

A. would

(答案→)B. should

C. could

D. might

解析：情态动词should这里表示说话人惊讶的态度，意为“居然，竟然”。