1.________ will you travel to this summer ? I haven't decided yet A : where B: What C: Who 2. _______ did you sell yesterday ?- Bread and cupcakes A: What B: Who C: Which 3. _______ dress did she buy ?- The red or the blue one ? A:What B: Whose C: Which 4.________ is playing the piano upstairs ? A: Who B: Whose C: Whom 5. To _______ should i address the letter ? A: Who B: Whose C: Whom ( giúp mk nhó mấy pạn )