500 YEARS AGO THE AVERAGE HUMAN...WAS ABOUT 40 YEARS. A. LIFE LENG...

20. - BAI TAP TRAC NGHIEM TIENG ANH 12
BAI TAP TRAC NGHIEM TIENG ANH 12
20. 500 years ago the average human...was about 40 years. A. life length B. lifetime C. life cycle D. life span