No matter how much knowledge you have, if your subject is at all ______, be careful when discussing it during your speech, or you may well offend your audience.
The young man acted strangely during the interview. He made a bad impression _____the employer.
――Don’t forget to return the book in two weeks. ――_____.Don’t worry about it.
The lawyer seldom wears anything other than a suit ____ the season.
――Did they offer us enough books? ―― _____ than we had expected.
What a pity! Considering his ability and experience, he ____ have done better.