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HE ________ FOR TWENTY YEARS BEFORE HE RETIRED LAS...
HE ________ FOR TWENTY YEARS BEFORE HE RETIRED LAST YEARA
Unit 1: HOME LIFE
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Đáp án tham khảo
10. He ________ for twenty years before he retired last year
A. had been teaching B. has taught C. was teaching D. has been teaching
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10.
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Unit 1: HOME LIFE