A murderer has escaped from prison, so a nationwide search for him is .
A. on the way
B. in a way
C. in the way
D. under way
网友回答
A. on the way
B. in a way
C. in the way
(答案→)D. under way
解析：考查介词短语辨析。句意：一个杀人犯越狱了，因此，一场全国范围的搜捕正在进行。A在去......的路上；B在某种程度上；C妨碍，挡道；D正在进行。故选D。