题目内容
Mr. Smith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school.
A. after that B. from then on C. from then D. since then
C
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题目内容
Mr. Smith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school.
A. after that B. from then on C. from then D. since then
C