As we had to keep the fire going throughout the games, we had to add firewood _______ ( 章节：7 难度：3)_做题室

单项选择题As we had to keep the fire going throughout the games, we had to add firewood _______ ( 章节：7 难度：3): A、specially; B、permanently; C、previously; D、constantly

正确答案：D
答案解析：
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