DIFFERENT CONSERVATION MEASURES ______ SO AS TO SAVE VULNERABLE SPE...

28. - DE KIEM TRA 1 TIET MON TIENG ANH LOP 12 CO DAP AN
Tiếng Anh DE KIEM TRA 1 TIET MON TIENG ANH LOP 12 CO DAP AN

28.

Different conservation measures ______ so as to save vulnerable species.A. can't have been taken B. have been takenC. must have taken D. wouldhave taken