One day Mary was busy working in her office in London ____ she received an E-mail from her friend Joan. In Joan's e-mail, she persuaded Mary ____( look) for a flat in London for her. As she had____ (little) money at her command than before, the flat had to be cheap, but it had to be modern, with elevators and gas lines. It had to be in the____ (east) part of London, with petrol and subway stations nearby. Though Mary found it difficult to find such a flat, she still went ____(care) from one block(街区) to another, looking for a flat ____would meet（满足） Joan's requirements. Having tried too many times, Mary met her boss and politely asked him ____advice. It was the first time that she____ (talk) with his boss about her personal problems. It happened that the boss just had such a flat for rent, so they quickly reached ____agreement(协议). But to her surprise, when she e-mailed Joan, telling her the good news, Joan said that she had changed____(she) mind—she was not returning to London.