Nothing gives him more pleasure than helping someone __________

He argued __________ smoking, and insisted that it was ____________ argument thatsmoking is harmful to health

I can’t thank you ________ much because without your help I ________ have won the first prize

Mary is so crazy _____ that famous singer that her hairstyle is similar _____his

Was it by cutting down staff _ _she saved the firm? —– No, it was by improving work efficiency.