根据对话内容判断下列句子正误。
John：What did you do last Saturday，Mike?
Mike：On Saturday I went to the zoo．
John：Did you go there by yourself?
Mike：No．I went there with my brother．
John：What about Sunday?
Mike：I helped my mum with the housework．
John：Did you wash the clothes?
Mike：Yes．Also l cleaned the window and cooked with my mum．What about your weekend?
John：Nothing special．I just was at home and did my homework on Saturday．and I visited my grandparents on Sunday．
