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Did Jane cut the grass yesterday ? Yes , she did . Did Peter write a letter yesterday ? No , he didn't. Did Peter meet his friends yesterday ? Yes , he did . Did Pam and Ban write a letter yesterday ? No , they didn't . Did Pam and Ben meet their friends ? Yes , they did. Did Ann write a letter yesterday ? No , she didn't . Did you cut the grass yesterday ? Yes , I did . Did you write a letter yesterday ? No , I didn't .