题目
Humans have wisdom teeth probably because ________A. our ancestors needed to chew more when they grew upB. our ancestors' teeth grew at late teens or early twentiesC. our ancestors ate foods without cookingD. our ancestors had very tough lives
Humans have wisdom teeth probably because ________
A. our ancestors needed to chew more when they grew up
B. our ancestors' teeth grew at late teens or early twenties
C. our ancestors ate foods without cooking
D. our ancestors had very tough lives
题目解答
答案
A. our ancestors needed to chew more when they grew up