Join the PET examination

Today I have entried for the PET-4 which is one of my planning this year.I have determined to take it.Before that I have alreay passed the PET-3 in 2005.Bacuase it can take the place of the self-education's english 2.But I concern about testing my english level this time.I checked the difference between PET and CET on internet.Some one said PET is easier than CET.I don't know if it is truth althrough I can not join the CET.Maybe that is one opportunity.I realize that I need change and raise my quality.There is no doubt that English is very important right now.