— Do you know if we will go for a picnic this Saturday?
— I think we will if we ________ any classes.
A:won't have
B:didn't have
C:don't have
D:aren't having
①身体的生命 ②社会关系中的生命 ③精神信念上的生命 ④其他人的生命
按要求完成句子。
老师耐心地不厌其烦地帮助学习差的同学。
改病句
____。