一，Ask for help（12-24）
A:Jim,Could you do me a faver?
B:Sure ,just ask ,what can I do for you?
A:My car has a problem starting,could you take a look at it for me?
B:No sweat,It's a piece of cake.
A:Are you sure?
B:Abselutely, I'm a great mechanic.
A:Thanks for helping me out,I really appreciate it.
B:Anytime.
二、It's a piece of cake to use a computer(12-25)
A:Lucy, I heard you have bought a new computer.
B:Yes,look,it is on my desk.
A:Your office is different with a computer.By the way ,is it difecult to use a
computer?
B:Not at all,It's a piece of cake.
A:A piece of cake?
B:Yes,it is esay and convenient to use a computer,But it takes a long time to really
master it.