The police have begun to ______ the murder case, but in vain.A、look intoB、look upC、look

The police have offered a large ______ for information leading to the robbers arrest.[2002

The history of the U.S. is generally agreed to have begun in______.A．1620B．1607C．1776D．149

You have lost a______of keys. Report the loss to the police.A．seriesB．chainC．bunchD．group

The police accused him______fire to the apartment, but he denied having been in the neighb

The detective and his assistant have begun to ________ the mysterious murder. A) c

The police have installed cameras at dangerous road ______ to film those who drive through