公园里的爱心提示牌写着：“小草微微笑，请你绕一绕”。践踏草坪会造成土壤板结，从而影响草的生长，其原因是(   )

世界上使用人数最多的语言是（  ）

在一个由草、兔、狐组成的生态系统中，如果将狐大量灭杀，兔群的数量将会（    ）

    One day after school I was just finishing up some math homework. My dad came back from work and sat right beside me1over my homework with me. We made corrections 2 After that we3and my dad said,＂ I will always4every moment spending time talking with you.＂

    I remember my Dad telling me his stories of when he was 5My dad didn't have a father6He was always moving from place to place with my 7My dad wasn't the easiest kid to 8He would 9with kids at school, which made my grandma worried. He'd act out to release the anger he had from not having his father present in his10and teenage years.

    At high school, things got a little 11 He made a football team, he did well and didn't get into as much 12as before. He also made many friends13those friends was my uncle. My Dad and Uncle were friends all throughout high school. It was through my uncle14my Mom and Dad met15Later, they got married. After I was born, my dad felt that becoming a 16was an honor and that he would not be17in my life.

    I suddenly looked up to see my Dad18at me. I could see in my Dad's eyes how he longed for a19 like this. I continued to do my math homework and20my Dad say,＂ I love you, always.＂