问题补充:
Peter was so excited he received an invitation from his friend to attend the wedding.
A. where
B. that
C. why
D. when
答案:
A. where
B. that
C. why
(答案→)D. when
解析:考查状语从句。状语从句:when he received an invitation from his friend to attend the wedding.修饰整个一句话Peter was so excited句意:当他收到来自朋友的婚礼请柬的时候,他非常高兴。根据句意说明D正确。