A：I'm exhausted. My new exercise is so hard.
B：I think it is easy.I could work in your calss with no problem.
A：You thing so?
B：Oh, without doubt.When is the next calss?
A：Tomorrw morning.Try it.
B：No problem.
A：Are you going to this calss this morning?
B：Of course,easy.No sweat.
A：You're no able to move after this class.
B：Are you kidding me?It's going to be up a piece of cake.
A：You want to bet?
B：Yeah,what't the bet?
A：I bet I can go one hour in your class this morning and not feel a thing.