I didnot understand the whole(整个)thing———she told me the secret(秘密)

问题描述:

I didnot understand the whole(整个)thing———she told me the secret(秘密)
A until
B when
C after
D because

选A.not ...until ...意为直到.才.
句子意思为,直到她告诉我这个秘密,我才知道这件事情的来龙去脉.