31.   But an important test came last summer, when the pilots union and the International Association of Machinists started negotiating with the company for wage increases.

32.   But Cohen said he was very confident that these final tests would also come back negative, meaning that none of the letters sent from St. Petersburg were contaminated.

33.   But his sternest test will come on the drive home.

34.   But Griffin said the true test comes Friday during agility drills.

35.   But no one expected the test run to come so soon or under such tragic circumstances.

36.   But officials did not disclose the composition of the powder, saying only that tests came up blank.

37.   But others say the tests will come down to a few hundred dollars apiece.

38.   But the bigger test probably will come in November, when a referendum on the matter will be held for island residents.

39.   But the intelligence analysts differ over how soon such a test may come.

40.   But the real test could come for the Trojans secondary, which will be forced to cover receivers for a longer time than usual.