What is the primary type of all single female employees hired between 1/1/2008 to 12/31/2008?
primary type refers to PersonType; single refers to MaritalStatus = 'S"; female refers to Gender = 'F'; HireDate BETWEEN '2010-1-1'AND '2010-12-31';
SELECT T2.PersonType FROM Employee AS T1 INNER JOIN Person AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID WHERE T1.Gender = 'F' AND T1.MaritalStatus = 'S' AND STRFTIME('%Y-%m-%d', T1.HireDate) BETWEEN '2008-1-1' AND '2008-12-31' GROUP BY T2.PersonType ORDER BY COUNT(T2.PersonType) DESC LIMIT 1