11.  A control group had to be examined as well as the group that we are studying.

12.  A control group of non-smoking women was compared to four groups of women smokers.

13.  A cursory glance at the literature in this field reveals the importance of suspicions concerning gossiping groups of women.

14.  A Decision either way on Roe can therefore be perceived as favoring one group or the other....

15.  A distinguished group of authors is slated for the seventh annual Women Writers Event.

16.  A disturbance broke out between local youths and a group of sailors.

17.  A family systems approach to work with minority groups must take account of all these factors.

18.  A few living jawless fish are the only remnant of this ancient group, and they are highly specialized forms.