问题
选择题
＿＿＿＿＿hearing the good news, they jumped with joy.
A．For
B．To
C．On
D．At
答案
答案：C
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.
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