John didn't feel well yesterday; otherwise he ______ to see his friend off at the airport． （ ）
A：came
B：would come
C：would have come
D：should be coming
人体发生酒精过敏时，身体的某些部位(如颈部)出现红肿，原因是细胞释放组织胺，导致毛细血管通透性增大，则
辨析题
A：约束限制了我们的自由，越少越好。
B：无规矩不成方圆，约束越多越好。
