1. a piece of cake:

something very easy or simple to do

2. in hot water:

in trouble

3. be in two mind about (something):

to be unable to come to a decision about something

4. there is nothing els for it:

there is only one thing to do, there is no choice

5. in seventh heaven:

extremely happy or pleased, delighted

6. like the wind:

very quickly

7. live from hand to mouth:

to have enough money to supply only what is really needed for survival, to be very poor

8. be dead to the world:

to be deeply asleep

9. put heads together:

to discuss something

10. stand on one's own two feet:

to be independent

11. lose touch with (someone):

to stop communication with someone

12. lose one's voice:

to be unable to speak because of having a sore throat, etc

13. not (someone's) cup of tea:

not something that someone likes or prefers

14. eat like a bird:

to eat very little

15. feel at home:

to feel very relaxed, as if one is in one's own home

16. have something on:

to be busy, to have to have another engagement

to feel very happy