单选题：How old was the baby when he learned to say that word correc

题目内容：

How old was the baby when he learned to say that word correctly? A．About 18 months.
B．About 21 months.
C．About 24 months.
D．About 12 months,

参考答案：

答案解析：

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分类：公共英语三级题型：单选题

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