BALLOONS10%-20% OF UFOS ARE OTHER CAUSES (SUCH AS BIRDS, CLOUDS, MI...

3. - BO DE TRAC NGHIEM TIENG ANH 9 3 DE
Lớp 9 BO DE TRAC NGHIEM TIENG ANH 9 3 DE

3. balloons

10%-20% of UFOs are other causes (such as birds, clouds, mirages, searchlights, etc.)