一、语法选择（共15小题；每小题1分，满分15分）
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1 ~ 15各题所给的 A、B、C和D 项中选出最佳选项，并在答题卡上将该项涂黑。
I am Jack. I study at Kenny Middle School. I am 1 only child in my family. I live in a flat in the city center. My dad 2 for an advertising company and my mum is a lawyer. Last month, my mum got a new job 3 is in Hong Kong! She stays there and only come home at weekends and during holidays.
I 4 to do any housework at home before. My mother used to do 5 for me. She cooked meals for me. My clothes 6 by her too. But now she works in Hong Kong. She encourages me 7 after myself. “You must 8 to do everything for yourself while I am away,” she said.
So I am learning how to cook and wash clothes by 9 . I also tidy my bedroom every day and
