The class which ____(was,were) divided into four groups_____（has,have）not agreed among themselves about where they should go and have a picnic.
问题描述：
The class which ____(was,were) divided into four groups_____（has,have）not agreed among themselves about where they should go and have a picnic.
答
was have
答
was，have
答
was此处class作整个班级讲,是单数
have此时class作全班同学讲,是复数
family这个单词也有类似的用法——即可作家庭,也可作家庭成员
答
was, has
这两个都是修饰class， 所以用单数， 第3人称
呵呵，希望可以帮到你，有不懂的还可以问我^^