给问句选择恰当的答语

⑴Did you buy some water ?             A、I helped my mother .

⑵What happened to your head ?     B、They are my grandparents .

⑶What did you do last Sunday ?      C、No , I wasn't .

⑷Were you at home yesterday ?      D、No , I didn't .

⑸Who are they , Lingling ?               E、I fell off my bike and bumped my head .