31.   By isolating specimens whose internal clocks were out of sync, scientists were able to locate the genes that control biological rhythms by identifying genetic variations.

32.   By the time the clock was up for sale, Williamsburg had bought a more traditional Spitler clock, and decided not to acquire a second one.

33.   Clocks were set on German time.

34.   Clocks are not good gifts for Chinese associates, since the Mandarin word for clock is similar to the word for death.

35.   Dr. Fidelia Valenzuela, a semi-retired family practitioner, would like the clocks to be consistent.

36.   Even the wall clock was a flag-red, made-in-Moscow model, with a hammer and sickle on its face.

37.   Forget other proposals, the stopped clock is the only solution to the millennium-bug problem.

38.   He is on the crew team, and since practice is early, the clock is his most important possession.

39.   His priceless story about raising Iranian sheep, whose inner clocks were still on Iranian time, is not irrelevant.

40.   If there is a clock this time, when will it tick to the magical moment of decision?