So / Because Error Correction
Are these sentences using "so" and "because" correct or wrong?
- He won the lottery so he was very happy.
- He can't walk very well because of the accident.
- He's very happy because he got a new job.
- We're tired because we were walking all day.
- We're tired so we're going to bed now.
- I'm crying because Yvonne is cooking with onions.
- There's nothing on TV tonight so we can go out.
- That child is not very intelligent so speak slowly to him.