【題目】Kids don’t learn their native language , but they become fluent in them within a few years.

A．consciously

B．effectively

C．carefully

D．naturally

【答案】A

【解析】句意：孩子們無意識地學習母語，但幾年之后，他們說得很流利。consciously

有意識地；effectively有效地；carefully小心地；naturally自然地。

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