51、B I left a bookstore and walked on the street, I saw a woman standing outside the post office.
52、D She told me that her foot was hurting and she had to go to the hospital right away, but there was no taxi.
53、A 短文中,作者带着这位女士到医院了
54、D He gave me because he had an extra （额外的）one and he wanted to do good things to others!
55、A 帮助他人者最后会得到回报