Would Rather (Sooner) vs (Would) Prefer 1

Complete each sentence with one of the words given:
prefer | would prefer | would rather | would sooner
◄ = = = click here before you start!
1) My girlfriend and I
heavy metal to classical music.

2) I
learn English than German.

3) Our friends
to write to him rather than call him.

4) We
driving to travelling by train.

5) Our children
have coffee than tea.

6) I'm so tired. I
not go to the party in the evening.