Помогите с английским пожалуйста

1) I usually return from school at 3pm. My mother returns at 18 o'clock.
2)Because nowadays people usually ring the bell. I do it last at school when I wanted to enter the classroom.
3)I don't know. But I think that Russians live about 75 years.
4)The last Russian tsar was Nikolai the Second. He died on July 17, 1918.
5)-
6)I often kill time. I often surf the Internet, that is why I kill my time.
7)Yes, I can.
8)I always catch cold in autumn. But I seldom catch cold in winter.
9)Yes, I do. I hate this!