Mark started middle school when he was twelve. He studied very hard and always got good grades. He was very interested in 1, especially running. He got up early every morning and 2 to school.
In his second year, Mark took part in the school's sports meeting and 3 a race. His parents were happy with him and 4 him a computer. But things began to change. Mark stopped getting up 5. He also lost interests in sports. His grades were not so good as before.
One night, about one o'clock in the morning, Mark's mother 6 him playing computer games in his room. Then she knew why he 7 so much. But she didn't take his 8 away. Instead, she had a 9 talk with him. She told him he was old enough to know well what to do, and what not to do.
After hearing his mother's 10 words, Mark was sorry for his change and decided to make good use of his time from then on.
