Mrs. Smith has been teaching in a school since she graduated, so she is not __________ to associating with business people.

official

 —Why should I correct it right now, Mum? It’s OK, I think. — Well, Honey, it will _______ trouble in the future.

Many human activities also _______carbon gases, which will result in global warming.

 The school, more than 90 percent of whose graduates are usually admitted into key universities, enjoys an excellent _______.