71.   A van unexpectedly shifted into reverse then plowed backward into students waiting for classes to begin at a middle school Wednesday.

72.   After reporting for the first day of school last Wednesday, teachers went on strike an hour before classes began the following day.

73.   As the class begins, the men appear angry, frustrated to be stuck.

74.   But soon Spanish class began to tell.

75.   Classes begin Tuesday.

76.   Classes begin next Monday.

77.   English classes begin in June and the first semester starts in October.

78.   He said the stabbings occurred shortly after classes began at the elementary school in Osaka, in western Japan.

79.   He said the stabbings occurred shortly after classes began at the elementary school in Osaka.

80.   If boys are truly maturing earlier, then sex education classes should begin earlier, she said.