The police are trying to find out the _____of the woman killed in the traffic accident.

Recently, these companies have _____ some workers because of the drop in economy.

My enthusiasm for Chinese football team gradually _____ because of their countless failures.

In view of all sorts of rumors and guesses, experts carried out some careful and scientific research and         the possibility of a second earthquake in this area.

Though bought ten years ago,the car is still in good ______.