聚合氯化铝铁Fe_aAl_b（OH）_cCl_dm是一种性能优良的无机高分子絮凝剂，在净水行业得到广泛应用．

阅读短文，回答问题。

Dear Amy,

   I want to 1 your friend. Let me introduce my family to you. My father is a doctor. He is tall 2 strong. My mother is a teacher. She is think and kind. My brother Sam is 6 years old. He's short and funny. We 3 in a big city. However, we usually go 4 on the weekends. I have a small and nice room. There is a bed and a desk in my room. I like reading books. I have many books 5 my desk. Welcome to my home.

                                                                                                                                                                        Yours,

                                                                                                                                                                          Lucy