【题目】The city of Harbin is developing fast and the subway is currently .
A. under buildingB. under attack
C. under discussionD. under construction
在线课程【答案】D
【解析】
考查介词短语辨析。句意：哈尔滨市发展迅速，地铁正在建设中。A. under building在……建筑物之下；B. under attack受到攻击；C. under discussion正在讨论中；D. under construction在建造中；正在施工中。结合句意可知应选D。