Here are a few links for you to train online:

Listening Comprehension

part 1 :http://www.english-online.org.uk/petfolder/petlistenp1.php?name=The%20Listening%20part%201

http://www.english-online.org.uk/petfolder/test2/petlisten1.php?name=The%20Listening%20part%201

part 2 :http://www.english-online.org.uk/petfolder/petlistenp2.php?name=The%20Listening%20part%202

http://www.english-online.org.uk/petfolder/test2/petlisten2.php?name=The%20Listening%20part%202

part 3 :http://www.english-online.org.uk/petfolder/petlistenp3.php?name=The%20Listening%20part%203

http://www.english-online.org.uk/petfolder/test2/petlisten3.php?name=The%20Listening%20part%203

part 4:

http://www.english-online.org.uk/petfolder/test2/petlisten4.php?name=The%20Listening%20part%203

Reading Comprehension :

http://www.examenglish.com/PET/reading1.htm

http://www.pearsonlongman.com/exams/ket-pet/pet/reading-test.html

Writing:

http://www.examenglish.com/PET/PET_writing_part1.htm

http://www.examenglish.com/PET/PET_writing.htm

http://esl-bits.net/main2.htm

Speaking :

http://www.writefix.com/pet/index.htm

Files to download : (PET corresponds to the level of CEC = B1)

http://www.cambridgeesol.org/resources/learner/index.html