23．Our English teacher’s favorite expression is as follows: “Time flies! Three years will have passed and you will be saying goodbye to all the teachers here you know it. A．after B．when C．before D．until 【
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Our English teacher's favorite expression is as follows:“Time flies! Three years will have passed and you will be saying goodbye to all the teachers here ________ you know it.”
- A.
after
- B.
when
- C.
before
- D.
until
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