What does the author say about people’s sleeping habits?
A、They are culture-related.
B、They affect people’s health.
C、They change with the seasons.
D、They vary from person to person.
发布时间:2025-07-10 00:29:40
A、They are culture-related.
B、They affect people’s health.
C、They change with the seasons.
D、They vary from person to person.