4. Don't go out until your work \( \qquad \) (A) had been done (B) was done (C) will do 5. A book \( \qquad \) by its cover. (A) knows (B) is known (C) knew 6. I used my brother's glasses while mine \( \qquad \) (A) were repairing (B) was being (c) were being repaired (D) was repair

The expression "Don't go out until your work is done" means that we should prioritize completing our tasks before enjoying free time. This phrase captures the balance between responsibility and leisure, emphasizing the importance of finishing what we start! When it comes to the second question about judging a book by its cover, it's a common saying that suggests people shouldn't make judgments based solely on appearances. The idea is that true value often lies beneath the surface, encouraging readers to dive deeper and discover the content that truly matters, rather than relying on initial impressions!