(sinCE thE BEginning) oF this CEntury, morE AnD morE sCiEntists (hAvE BEComE) intEr-EstED (in) (thE wAy how) thE humAn BrAin works.
A．sinCE thE BEginning
B．hAvE BEComE
C．in
D．thE wAy how