( )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____ 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 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.