1.All the work should be done according to the plan.
2.His absense adds to our difficulty.
3.I can't afford to buy the expensive car.
4.You are not allowed to bring these books out the library.
5.People say good to you when you meet as a rule in England
It's better if all the work be done according to the plan.
Their absence added to our difficulty.
I cannot afford to buy this expensive car.
You are not allowed to take these book out of the reading room.
As a rule, people in England would say "hello" when they meet.