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A.after his
B.before his
C.after its
D.before its

A.after
B.before
C.after
D.before

【参考答案】

B
根据下文的pokedaroundwithsticksandstraws(拿着棍棒和秸秆这些工具到处戳戳),推断这是石器工具制造以前的事情,此外primitiveman的物主代词应用his表示,故选B。