iF thE wholE FrAmEwork oF thE thEsis ______ BEForEhAnD, A grEAt DEAl oF timE AnD EnErgy woulD hAvE BEEh sAvED.
A．wAs DEsignED
B．hAD BEEn DEsignED
C．wErE DEsignED
D．hAs BEEn DEsignED