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Mary: "Will you go to Ann's birthday party?"

Mary: "What will you wear if you go there?"

Mary: "What present did you give her last year?"

Mary: "What are you going to buy as a present?"

Mary: "Can we choose a present together?"

Mary asked if she would go to Ann's birthday party.

Mary asked what  she would wear if she  went there.

Mary asked what present she had  given her the previous year.

Mary asked what she was  going to buy as a present.

Mary asked if they could choose a present together.