What happened to the child in Frederick's experiment?
A.The child's brain was damageD.
B.The child dieD.
C.The child kept silent.
D.The child heard no mother tonguE.

A.The
B.
B.The
C.
C.The
D.
D.The
E.

【参考答案】

C
解析：本题为细节题。从句子“Judging from the experiment of Frederick......

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