(a) They stayed back to clean up the rubbish / school / canteen.
Some students stayed back (at school) to clean up the school compound.
(b) I sew dresses for my daughter.
(c) During the /that day, the teacher were busy to prepare food and drinks.
(d) They arrived (to school) early morning.
(e) They held a school charity at the school compound.
(f) The stalls sell many types of food such as curry puffs, fried chickens and many more / …and so on. / … or others.
There were many various types of food and drinks in each stall. That’s was why he liked the charity.
(g) On that day, the people gave full support for the charity.