Could you please check if all the sentences are correct? Thank you.

1) To start with, I’ll have a tomato salad. I couldn’t help crying. I’m worried about Brian’s getting low marks at school.
2) He admitted eating all the biscuits. I couldn’t do anything but answer Peter’s email. I spend a lot of time surfing the net.
3)Did you manage/Were you able to finish your maths test? He earns a living by working as a postman. I saw him getting into the car. Was it difficult for you to translate the letter?

1. I'd delete "getting" -- everything else is fine.

2. OK

3. OK

Super!!