写作

假定你是李华，你们班要去北京旅行，Mr Zhang想在班上选一位同学当向导，你已经去过北京好多次了，并且熟悉那里的人文景观，因此你给Mr Zhang写了一封信推荐自己。信中要包括：

1你已经去过北京好多次了，知道一些有趣的地方；

2到北京后你打算带同学们参观哪些景点，并对每一景点作一些简略介绍；

3建议同学们带些必需用品。

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    My name is Linda. Amy is my best friend. She 1 long straight black hair and two big black eyes. 2 nose is very small. She is beautiful.

    She is 3, too. Amy likes animals, so she 4 helps her grandparents take care of (照顾) their cat and dog. She is also a 5 student in my class. She studies very hard 6 she often helps other students. After school, we often play together. We 7 swimming very much, so summer is our favorite season.

    She is not the only 8 in her family. She has a sister of only three years old. Her name is Lucy. Lucy is a cute girl. She 9 me sister the first time. When we go to the park, she wants to go to the 10, too. When we read at home, she wants to read, too. How funny!

化简$\overrightarrow{AB}$+$\overrightarrow{MB}$+$\overrightarrow{BO}$+$\overrightarrow{OM}$的结果是（　　）