问题描述：
Did Jack come back early last night?—Yes.It w
Did Jack come back early last night?
—Yes.It was not yet eight o’clock _______ he arrived home.
A.before B.when C.that D.until
Did Jack come back early last night?
—Yes.It was not yet eight o’clock _______ he arrived home.
A.before B.when C.that D.until
问题解答：
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