How pleased the detective was what his customer told him
A. hearing
B. heard
C. to hearing
D. to hear
网友回答
A. hearing
B. heard
C. to hearing
(答案→)D. to hear
解析： be pleased to do sth.为固定结构,不定式表原因。此感叹句的陈述句形式为： The detective was pleased to hear what his customer told him.