11.   If they have not yet stumbled on a culprit, he and his colleagues have produced what they consider promising leads.

12.   Instead, he spent three hours placing calls, until he found a promising lead.

13.   Ms. Scott has been making cold calls to prospective employers for a month and has some promising leads.

14.   Now a team of newcomers to the field of AIDS research has turned up what appears to be a highly promising lead.

15.   Researchers are expected to produce promising leads for drugs and weed them out quickly or move them through the early testing stages and into the clinic.

16.   The agreement would give Abbott potentially promising new leads for drugs, since Millennium has been unraveling the genetic mechanisms underlying obesity.

17.   The case, investigators said, had promising leads from the start.

18.   The two detectives assigned to the case chased more promising leads, according to law enforcement officials.

19.   Without any obvious promising leads, police will likely rely on informants to point them toward a suspect.

20.   A promising lead has failed to bring authorities closer to the kidnappers of two European tourists.