work hard_____physics应填什么

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• 3个冠词小问题 请多指教!What an interesting work we are doing.对么填冠词!1.What an interesting work we are doing.对么但work 不是不可数的么 2.Xiamen is ____ most beautiful city in summer.那么 the 不可以么?3.Tina looks especially pretty tonight.Yes,she always looks her ____ best in ___ dress of that color.答案为the the这是什么用法么?*best前有物主代词啊!还要the?
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