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A
Who are they?
grandfather
mother
grandmother
father
grand
father
grand
mother
class
father
car
ask
[ɑ?]
glass
[?]
mother
come
bother
bus
but
Who 's this ?
grandmother’s mother
grandfather’s father
Peking man
Peking man at Zhoukoudian is near Beijing.北京猿人住在北京附近的周口店
They lived about 300,000-500,000 years ago.他们生活30万-50万年以前
He was like a monkey .他像猴子
They lived in the cave他们住在山洞