Question

【题目】I am very excited _______ I hear the news that the high-speed rail will be built from Hefei to Wuhu.
A.before
B.when
C.until
D.While

Answer 1

【答案】B
【解析】【解析】句意:当我听说从合肥到芜湖的高速铁路将要被建成的时候我非常激动。A. Before在以前；B. When当……时候；C. Until直到；D. While当……时候, 引导延续性动作或者状态的句子。根据语意故答案选B。