单项选择题

Questions 14 to 16 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage.
According to the study, an infant child can form friendship as young as ______.

A．six months old
B．one year old
C．eighteen months old
D．two years old

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单项选择题

单项选择题

Questions 14 to 16 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. According to the study, an infant child can form friendship as young as ______. 您的浏览器不支持 audio 元素。