答案：4 doesn't
go to school 去上学, 主语是little Mary, 第三人称单数否定应该用助动词： doesn't
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟,请及时采纳,多谢!谢谢额！那2、3选项是什么意思？2 won't是一般将来时的否定形式如： He won't go shopping tomorrow.3。 hasn't是现在完成时的否定形式如： He hasn't finish his homework yet.