摘要： I didn't manage to do it you had explained how . A. unless B. until C. when D. before
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I didn’t manage to do it_________ you had explained how.
A. unless B. until?
C. when D. since
I didn’t manage to do it_________ you had explained how.
A.unless B.until?
C.when D.since
查看习题详情和答案>>I didn’t manage to do it ______ you had explained how.
A. until B. unless C. when D. before
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