Drunk driving, which was once a frequent occurrence, is now .
A. under debate
B. under control
C. under construction
D. under investigation
网友回答
A. under debate
B. under control
C. under construction
D. under investigation
解析:考查介词短语:A.under debate在辩论,B.under control被控制,C.under construction 在建设中,D.under investigation在调查中,句意:曾经频繁发生的酒后驾驶.现在已得到控制。选B。