SQL select error: too many line continuations

I have code which will only let me select 22 columns then comes up with 'too many line continuations' if I try to add another one.

I have about 100 columns to add on for this formulae, and need to copy over another 100 which don't need 'checking'.

Code

strSQL = "SELECT a.[A], " _ & "(SELECT Max([Serial]) FROM [Data$] b WHERE b.[A]=a.A) As Serial, " _    
& "(SELECT Max([B]) FROM [Data$] b WHERE b.[A]=a.A) As B, " _    
& "(SELECT Max([C]) FROM [Data$] b WHERE b.[A]=a.A) As C, " _    
& "(SELECT Max([D]) FROM [Data$] b WHERE b.[A]=a.A ) As D, " _    
& "(SELECT Max([E]) FROM [Data$] b WHERE b.[A]=a.A ) As E, " _    
& "(SELECT Max([F]) FROM [Data$] b WHERE b.[A]=a.A ) As F, " _    
& "(SELECT Max([G]) FROM [Data$] b WHERE b.[A]=a.A ) As G, " _    
& "(SELECT Max([H]) FROM [Data$] b WHERE b.[A]=a.A ) As H, " _    
& "(SELECT Max([I]) FROM [Data$] b WHERE b.[A]=a.A ) As I, " _    
& "(SELECT Max([J]) FROM [Data$] b WHERE b.[A]=a.A ) As J, " _    
& "(SELECT Max([K]) FROM [Data$] b WHERE b.[A]=a.A ) As K, " _    
& "(SELECT Max([L]) FROM [Data$] b WHERE b.[A]=a.A ) As L, " _    
& "(SELECT Max([M]) FROM [Data$] b WHERE b.[A]=a.A ) As M, " _    
& "(SELECT Max([N]) FROM [Data$] b WHERE b.[A]=a.A ) As N, " _    
& "(SELECT Max([O]) FROM [Data$] b WHERE b.[A]=a.A ) As O, " _    
& "(SELECT Max([P]) FROM [Data$] b WHERE b.[A]=a.A ) As P, " _    
& "(SELECT Max([Q]) FROM [Data$] b WHERE b.[A]=a.A ) As Q, " _    
& "(SELECT Max([R]) FROM [Data$] b WHERE b.[A]=a.A ) As R, " _    
& "(SELECT Max([S]) FROM [Data$] b WHERE b.[A]=a.A ) As S, " _    
& "(SELECT Max([T]) FROM [Data$] b WHERE b.[A]=a.A ) As T, " _    
& "(SELECT Max([U]) FROM [Data$] b WHERE b.[A]=a.A ) As U, " _    
& "(SELECT Max([V]) FROM [Data$] b WHERE b.[A]=a.A ) As V " _    
& "FROM [Data$] a " _    
& "GROUP BY a.[A]"