he's going to travei all over the world an

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enjoyand前后格式一样,所以与travel一样也是原形
======以下答案可供参考======
供参考答案1:
he's going to travel all over the world and (enjoy )things
注：与travel 一致（AND 连接的两个动词时态要一致，这里作并列谓语）
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