C. was, were
C was, wereyesterday " 昨天”, 用一般过去时, be动词的过去式是: was, were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!
C希望帮助到你,若有疑问,可以追问~~~祝你学习进步,更上一层楼!(*^__^*)
选c,从时间看是过去,要用过去式,表示天气一般用单数,后面的the children 是复数形式。所以选C
c.was;were