Please help me choose the right word and phrase??

Could you please help me with these sentences?

- I'm going to become/get jealous soon.

- He's falling asleep just like/as he does the other days.

- Don't shave like/as you always do. Shave properly.

- Which restaruant are you calling on behalf of/On behalf of which restaurant are you calling?

- The alarm sounded all of a sudden.

- In the 6 years that I've been dating I've never felt like this about anyone so fast. I've never introduced someone to my parents do quickly.

- The first fight is always good. It means you're intimate enough to have a fight.

Thank you