17. WE _______ TOUCH SINCE WE _______ SCHOOL THREE YEARS AGO.17. WE __...

17 . - BAI KIEM TRA UNIT 123 ANH VAN 12 17 . - BAI KIEM TRA UNIT 123 ANH VAN 12
BAI KIEM TRA UNIT 123 ANH VAN 12

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. We _______ touch since we _______ school three years ago.a. lost / have left b. have lost / leave c. have lost / left d. were losing / had left