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来源:雅诚德英语网
I believe that you are never too old to write a thank-you note, and since he didn't open the gifts in front of anyone, thanking them for coming isn't sufficient.
我认为不管年纪多大,写感谢信是一定要的,即使他没有在任何人面前拆开礼物,只在朋友们登门时道谢是不足够的。