Помогите с английским:

1. Steve and Mark .... at school today because they're ill
а) don't
б) aren't
в) isn't
г) are

2. My parents ............ speak English.
а) can
б) don't
в) does
г)can't

3. This is my ........... computer game.
а) brother
б) brother's
в) brothers
г) brothers'

4. ............. any children in the playground?
а) Is there
б) There's
в) Are there
г) There are