我们必须马上打扫教室吗？

Must we clean the classroom at once?

youdao

教室必须及时打扫与清理，不破坏自然环境，制止折树枝、乱扔垃圾等行为。

Clean classroom does not destroy the natural environment. We should stop off branches, no littering and other bad behaviors.

youdao

教室必须及时打扫与清理，不破坏自然环境，制止折树枝、乱扔垃圾等行为。

Clean classroom does not destroy the natural environment. We should stop off branches, no littering and other bad behaviors.

youdao