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．
需区分物质
方法一
方法二
A
空气和氧气
用带火星木条检验
闻气味
B
硬水和软水
观察颜色
加明矾搅拌
C
铜丝和铁丝
用磁铁吸引
D
二氧化碳和氮气
澄清石灰水
燃着的木条
下列句子中划线词语使用有误的一项是（ ）
在
处的切线平行于直线
，则