Народ, пожалуйста помогите решить 2, 3

2/

My sister stayed at her friend's house for a few days.

I was doing my homework when suddenly I heard a loud explosion.

We eat together as a family about three times a week.

I got better at remembering words in English these days.

In the winter, many birds fly south to warmer countries.

'Hello? No, Tom has a shower at the moment. Can I take a message?'

I swam almost every day last summer.

My mum wants to learn to use a computer, so she has lessons.