A murderer has escaped from prison so a nationwide search for him is .A. on the wayB. in

问题补充：

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

答案：

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。