Peter was so excited he received an invitation from his friend to visit Wuxi.A. whereB. th

问题补充：

Peter was so excited he received an invitation from his friend to visit Wuxi.

A. where

B. that

C. why

D. when

答案：

A. where

B. that

C. why

(答案→)D. when

解析：考查从句的引导词。句意“当皮特收到来自朋友的邀请他访问无锡的信时，他是如此的兴奋。”A“哪里”；B只起引导作用，无意义；C“为什么”；D“当”。故选D。