A、A thief had abandoned it by the roadside. B、It had been towed away by the local police. C、The owner had forgotten where he had

The recent increase in car stealing has alarmed the police who are looking for what they now believe must be a well-organized gang of professional car thieves.
    Most of the thefts have taken place in the rich residential areas around Southwell Park, where last week alone 22 car thefts were reported to the local police. Of these, only one has been found, abandoned in Rockinghill Palace Road 20 miles away. The others have still not been found except for one which had been falsely reported missing. The owner later admitted that he had forgotten where he had parked it a few days before. An interesting aspect of the thefts is that nearly all the missing vehicles had been taken from locked garages. The owners now admit that they may have left the car doors unlocked, but only one owner was not certain whether he had locked the garage door. The police had therefore assumed that the gang finds it easier to break into garages where vehicles are often left unlocked at night and into locked cars parked on the roadside in daytime or at night. They advise car owners to lock up their cars even when they are kept in locked garages.
Questions 26 to 29 are based on the passage you have just heard.
26. What has alarmed the police?
27. Where was one car found?
28. Why was one car falsely reported missing?
29. What did the police advise the car owners to do?