ed ac- tivity ceases if subsequent events show that the activities "could not reasonably be expected to recur," Chinese for Affirma- tive Action v. Leguennec, 580 F2d 1006, 1009 (9th Cir.1978), art denied, 439 U.S. 1129, 99 S.Ct. 1047, 59 LEd.2d 90 (1979), unless there is a possibility of "continuing,