Mrs black often goes to work by bike ,but she ( )[not]today.适当形式填空,写上原因最好.
问题描述：
Mrs black often goes to work by bike ,but she ( )[not]today.适当形式填空,写上原因最好.
答
didn't
今天没有骑车去 说明已经发生了
所以用过去时为什么用过去时呢？布莱克太太今天没有骑车去 说明这件事情已经发生过了啊