11.   The museum has long used adult volunteers for everything from giving tours to de-rusting meteorites.

12.   The Sturgeon Bay Little League does not require background checks for adult volunteers.

13.   The survey, called Operation Storefront, enlisted youth and adult volunteers to note the positioning of ads in a random sample of preselected stores.

14.   Together with a handful of adult volunteers, they waged a massive cleanup campaign to save this ship.

15.   When he monitored adult volunteers, he found that a few aggravations or undesirable events were all it took to dampen at least one aspect of immune response.

16.   Neither the girls nor the adult volunteers could persuade the man to leave for almost an hour.

17.   This summer, that footnote came alive when Starbuck led students and adult volunteers on a month-long archaeological dig.