31.   It can also occur for no discernible reason.

32.   It was a humbling moment for a woman who rose from a working-classfamily where, she said, alcohol and sexual abuse occurred for generations.

33.   Last year, no strikes occurred for several hours, and Steven, who had claimed rights to the first fish on, nodded off.

34.   Many industry analysts liken the glacial transition to HDTV with the one that occurred for an earlier generation of Americans when they moved to color screens from monochrome ones.

35.   Moreover, the office found that the study did not prove that power failures had really occurred for unavoidable physical reasons.

36.   Much of the criticism comes from northwest Kansas, where seeding has occurred for three years.

37.   No contest for convention delegates will occur for five more months.

38.   No suicide bombings or other attacks against civilians inside Israel have occurred for eight days.

39.   Observers of the system said problems like these have occurred for decades.

40.   Other cases surely were occurring for more than a decade before then, Gao said.