1. Must Go to bed early.must not stay up late.
......................
2. Must Be polite.must not be rude
.......................
3. Must not wear jeans. Must Wear smart clothes
4. Must Put your mobile on silent.must not disturb people on the train
5. Must Take off your shoes.must not make the carpet dirty
6.must not jump the queue.must Wait for your turn
Answer: I think your answer should be B
If not, let me know
I think it is c because abrasive can be to scrape and abound can be to exist in great quantities or numbers.
