Wouldn’t it be______for you to pick me up at four o’clock and take me to the airport.

(2009安徽合肥质检)The police tried to get some clues from the suspect，but he remained     ．

A government official was murdered last Friday and the police are collecting information that is________to the case.

People complain that decisions to approve or deny a permit are often ____ rather than based on fixed criteria.

Our     resources and fine policy can certainly provide foreigners with the advantages of     developing their business.