21.   The list of opponents is growing longer as his personal behavior becomes more controversial.

22.   Through the years, his behavior became increasingly erratic.

23.   Unless healthy behaviors become the norm for more Americans, too many baby boomers will suffer needless sickness and die prematurely.

24.   When, as one witness has testified, concern was raised that such behavior had become widespread, was any action taken?

25.   Yet their behavior becomes more comprehensible when the discussion focuses on parsing presidential lingo.

26.   A leading academic has told how he sought to provoke the suicide of a colleague at Oxford University whose drunken, irrational behavior had become an embarrassment.

27.   But the truth is his behavior has become a liability at a time when the monarchy needs to modernize and move with the times.

28.   In many cases, ethical behavior has become an imperative.

29.   Police believe the man was acting under the influence of drugs, and say his behavior became erratic when he apparently began suffering withdrawal symptoms after a few hours.