题目内容
----You seem to have known Dr. Brown for a long time.
----That’s true. _____ he joined our club five years ago.
A. Since B. Until C. When D. If
A
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题目内容
----You seem to have known Dr. Brown for a long time.
----That’s true. _____ he joined our club five years ago.
A. Since B. Until C. When D. If