阅读理解，选择正确的答案。 

 It was a sunny day last Sunday. Liu Mei went shopping with her mother. On their way to the shop, they met (遇见) an old woman. The old woman wanted to see her husband (丈夫). He had a flu (感冒) and was in hospital. But she did not know the way to the hospital. Liu Mei asked a policeman. He told (告诉) her to take a No. 11 bus. Liu Mei went with the old woman to the hospital and her mother went shopping by herself. Forty minutes later, the old woman saw her husband. Liu Mei left the hospital and went to the shop. She did not wait for their thanks.