ir efforts to persuade us to buy thatproduct, shopkeepers have made a close study of human nature and have_______all our little weaknesses

__________ entered the office when he realized that he had forgotten his report．

. The company Ms King worked ten years ago has closed because of the financial crisis.

Mary was praised by the headmaster inpublic and on that _______ she was simply proud.

It is very kind you to help me with my lessons. It’s hard me to learn them well without your help.