The old man never knew the news that his son won the prize _____ he read the paper.A.when B.before C.until D.before

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The old man never knew the news that his son won the prize _____ he read the paper.A.when B.before C.until D.before
The old man never knew the news that his son won the prize _____ he read the paper.
A.when B.before C.until D.before

The old man never knew the news that his son won the prize _____ he read the paper.A.when B.before C.until D.before
C.until
not ...until 这里的never就相当于not