Подскажите как правильно ответить на вопросы ?

1. I can't see through a door.
2. I can swim in the river.
3. I can't ride a bike.
4. I can use skateboard.
5. I can't swim acriss the ocean.
6. I can't lift a double-decker bus.
7. I can't clap your hands behind your back.