Lucy was so excited she received an invitation from her friend to visit Beijing.A. whereB.

问题补充：

Lucy was so excited she received an invitation from her friend to visit Beijing.

A. where

B. that

C. why

D. when

答案：

A. where

B. that

C. why

(答案→)D. when

解析：句意：露西在受到来自朋友的去北京的邀请后是如此兴奋。所以选D。