问题
选择题
Peter was so excited _____he received an invitation from his friend to visit Wuxi.
A．where
B．that
C．why
D．when
答案
答案：D
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。
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