We mostly just say merry Christmas. If you know someone is specifically not Christian you might say happy new year, happy chanukah, happy Deavali (not sure I spelled that correctly!) whatever. 'happy holidays' is very American and I'd personally never say it.
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Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
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