Classes______ ,the students left for home without delay.选项:a、were overb、 being overc、 are over d、 over
问题描述：
Classes______ ,the students left for home without delay.
选项:
a、were over
b、 being over
c、 are over
d、 over
答
B
答
B
classes being over是下课的常用语,独立主格结构,