51.   I had received a letter from a very close friend.

52.   Young adolescents are happiest with small groups of close friends.

53.   They are discouraged from becoming close friends with foreigners.

54.   They are, rather implausibly, close friends.

55.   Despite their bitter screen rivalry, off-stage they are close friends.

56.   To Yale University, he was David Sneed.

57.   And some people called him that.

58.   Close friends called him Marc.

59.   They were close friends in college, but after graduation, their lives diverged.