阅读短文，根据内容，从所给的三个备选项中，选择最佳选项。

Mary is from Canada. She teaches English in China now. She knows a little Chinese. She isn't free(空闲的) from Monday to Friday. So she often goes shopping on Saturday.

Today is Saturday. Mary goes to the shop. She comes out of her car and goes into the shop. "What can I do for you? " the man in the shop asks her in Chinese. So she says in Chinese, "A quilt(被子), please." Then the man goes to the back of the shop. "My Chinese is not bad. The man understands(理解) me, " she thinks.

Mary is happy. Soon the man comes back. He shows Mary a cup.