阅读下面短文，按照句子结构的语法性和上下文连贯的要求，从各题所给的A、B、C和D项中选出最佳选项。

    Mary is from the US. She's now in Beijing1her parents. She's studying in a school. She tries hard to learn and speak Chinese. She often 2it with her classmates. But sometimes they don't understand her 3she can only speak a little Chinese.

It's Friday afternoon. Mary wants to go to the 4after school. She wants to see her favourite animal, the elephant. She asks her classmates 5to get there. But they don't understand her. She's very worried. Then she has6 idea. She takes out her pen and a piece of paper. She draws an elephant, a panda, and a giraffe on 7. Her classmates look 8the picture and 9Mary wants to go to the zoo. So they tell 10the way.