I have often wondered why he went to live abroad.
Explanation:
- Puzzled: This verb means to be confused or uncertain about something, but "wondered" is a more suitable choice to convey the sense of curiosity about someone's decision.
- Thought: This verb means to have a conscious mental process of considering or reflecting on something, but "wondered" specifically captures the idea of questioning or pondering.
- Wondered: This verb means to feel curious or uncertain about something and is the most appropriate choice to convey the sense of questioning why he went to live abroad.
- Surprised: This verb means to experience astonishment or unexpectedness, which doesn't fit the context of questioning someone's decision to live abroad.
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