( )I____ about this____he told meA:knew,until B:didn't know, untilC:don't know,when D:didn't know,after选哪个?

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()I____aboutthis____hetoldmeA:knew,untilB:didn''tknow,untilC:don''tknow,whenD:didn''tknow,after选哪个?()I_

( )I____ about this____he told meA:knew,until B:didn't know, untilC:don't know,when D:didn't know,after选哪个?
( )I____ about this____he told me
A:knew,until B:didn't know, until
C:don't know,when D:didn't know,after
选哪个?

( )I____ about this____he told meA:knew,until B:didn't know, untilC:don't know,when D:didn't know,after选哪个?
B 直到他告诉我我才知道这件事.