单项选择题

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.
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Jack Maple started his career in ______.
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The arguments that cloning will have harmful effects ______.
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B．have forced people to stop cloning
C．have forced people to question the concept of cloning
D．have compelled people to debate the implications of cloning
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