71.   Dozens of software tools are available for helping parents block, filter and track what their children do on the Web.

72.   During the day the staff psychologist visited each classroom to make sure the children were doing fine.

73.   Even a child can do it.

74.   Even children can do it.

75.   Even children can do strength training without harm.

76.   Eventually, however, she worked it out, as children usually do, and graduated from high school as class valedictorian.

77.   Experts say parents should know what their children do and whom they encounter online in order to help prevent sexual abuse.

78.   Finding none, she pitched in anyway, as children do.

79.   For my part, my children did some damage to the London house, a comfortable town house in a suburb of the city.

80.   For example, none of the autistic babies in the tapes learned to roll over like normal children did, he said.