21.   His face showed no trace of emotion until Michael Jordan appeared on the screen for a courtside interview.

22.   It is not unusual for criminals to launder money in Las Vegas casinos, but surveillance tapes show no trace of the hijackers.

23.   Law enforcement officials said on Wednesday that laboratory tests of airplane parts have not confirmed the presence of explosive material, even though some preliminary tests had showed traces.

24.   Never mind that his clothes showed no traces of flammable liquids.

25.   Nasal swabs taken of Arizmendi showed no trace of anthrax.

26.   Nor did he show any trace of anger or reproach of any kind.

27.   On a recent visit he presided over his clinic and showed no trace of modesty.

28.   One of them showed small traces of PFCs, according to a laboratory employee who insisted on anonymity.

29.   Other sidewalks showed no trace of the winter storm.

30.   She showed a trace of annoyance.