单项选择题

Questions 17～20 are based on the following talk. You now have 20 seconds to read Questions 17～20.
What happened to the child in Frederick Ⅱ’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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单项选择题

单项选择题

Questions 17～20 are based on the following talk. You now have 20 seconds to read Questions 17～20. What happened to the child in Frederick Ⅱ’s experiment 您的浏览器不支持 audio 元素。