题目内容
根据句意和汉语提示在句子空白处填上合适的单词。
The Smiths just came back from Qingdao．They had a lot of fun ________(旅行)there．
答案：traveling
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题目内容
根据句意和汉语提示在句子空白处填上合适的单词。
The Smiths just came back from Qingdao．They had a lot of fun ________(旅行)there．
_______________(保护)the environment.