单选题 The little boy was so excited ______ he had been told that he could go to the Disneyland in the holiday.
A. which B. when C. why D. where

【正确答案】 B
【答案解析】[解析] 该题考查when引导的时间状语从句。which意为“哪一个”，引导选择疑问句；why引导原因状语从句；where引导地点状语从句。