Are you sad? - No, I'm not. I'm happy., Is your dad at home? - No, he isn't. He's at work., Is it cold today? - Yes, it is., Are you married? - No, I'm not married., Are they good players? - Yes, they are., Is the library open today? - No, it isn't. It's closed., Is she a good singer? - Yes, she is. She sings well., Are you tired? - Yes, we are. We're very tired., Is your mother a teacher? - No, she isn't. She's a chef., Are we English? - No, we aren't. We are Brazilians. ,

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