Read and write（读一读，填上合适的内容，使句子通顺）
【小题1】—______ are the pupils? —They’re on the grass.
【小题2】—______ is your brother? —He’s very well.
【小题3】—______ are you? —I’m Mary’s sister.
【小题4】—______ can your friends do? —They can make sandcastles.
【小题5】—______ is the boy? —He’s ten years old.
