问题补充：
, tears came down.
A. Hearing the bad news
B. Heard the bad news
C. when to hear the bad news
D. When he heard the bad news
答案：
A. Hearing the bad news
B. Heard the bad news
C. when to hear the bad news
(答案→)D. When he heard the bad news
解析：考查的非谓语动词形式。前后主语保持一致，因此选D
