proverb abbreviations

[norma8863]

please help I`m stuck on a quiz with these few left!!!

1 - d b t h f l y

2- d u t a-c

3- f t p i p t f

4- w n d a a g
thanks

[valerieb1254]

2) Don't upset the apple-cart.

[mumof3angels]

3.Failing to plan is planning to fail

4.Worrying never did anyone any good

I thought 1. could have been 'Don't bite the hand that feeds you.' but obviously the last 2 letters are wrong.