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【题目】

When he was 20 years old, he a doctor in the village.

A. was

B. became

C. turned

D. changed

【答案】B

【解析】句意:当他20岁时,他成了一位乡村医生。was 过去是...;become指人的情绪或身体状态的变化, turn多接表示颜色的形容词,也接表示天气的形容词,它侧重变得与以前完全不同;change 改变。

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