91.   It cannot explain why the extinctions in North America happened before those in South America.

92.   It had never happened before.

93.   It has happened before at Belmont Park.

94.   It has happened before in afternoon contests against out-of-state teams in September.

95.   It has happened before in Boston and still he has won.

96.   It has never happened before, but as he struck out seven in six innings the beauty of spring was in bloom.

97.   It happened before a game I was watching at home on television.

98.   It happens before dawn, while Monica Robb is sleeping peacefully, whenever the wind blows a certain way.

99.   It has happened before, he said during a news conference Tuesday at the Russian Tea Room in Manhattan to promote the coming tour.

100.   It is posssible it has never happened before.