＿＿＿＿＿hearing the good news they jumped with joy. A. ForB. ToC. OnD. At

问题补充：

＿＿＿＿＿hearing the good news, they jumped with joy.

A. For

B. To

C. On

D. At

答案：

A. For

B. To

(答案→)C. On

D. At

解析：on (one’s) doing意为“当……时”，相当于when引导的时间状语从句。如：On (my) asking for information, I heard a loud noise outside.