SQL Server Case语句引用问题

Question

我正在尝试做case语句，但是单引号弄乱了它，请参阅下面的内容：

SELECT DISTINCT
    centernum,
    CASE CenterName 
       WHEN 'ABBOTTS COLLEGE  MILNERTON' THEN 'Abbotts Century City'
       WHEN 'ABBOTT'S COLLEGE' THEN 'Abbotts Claremont' 
       ELSE CenterName 
    END CenterName
FROM theTable

ABBOTT'S中的单引号将其弄乱了