It was not until I reached my apartment building and unlocked the door __________ what the noise had been.
A.that did I realize | B.before I realized |
C.that I realized | D.did I realize |
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It was not until I reached my apartment building and unlocked the door __________ what the noise had been.
A.that did I realize | B.before I realized |
C.that I realized | D.did I realize |