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。