(A) CERTAIN BATS USED THEIR OWN (B) SOUND TO (C) LOCATE FOOD AND T...

28. - BAI TAP TRAC NGHIEM TIENG ANH 12
BAI TAP TRAC NGHIEM TIENG ANH 12
28. (A) Certain bats used their own (B) sound to (C) locate food and to avoid obstacles (D) as they fly at night.