LET'S TRY THE FOLLOWING ONLINE EXERCISES:

http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?04

http://www.ego4u.com/en/cram-up/tests/relative-clauses-2

http://www.ego4u.com/en/cram-up/tests/relative-clauses-3

THE CALL OF THE WILD by Jack London

Here you'll find some online exercises and quizzes on this interesting story which reflects the theory of the "survival of the fittest".

Click on the following websites and you'll learn more and have fun:

• http://www.mce.k12tn.net/dogs/call/quiz1.htm
• http://www.gradesaver.com/call-of-the-wild/study-guide/quiz1/
• http://www.funtrivia.com/newflash/trivia.cfm?qid=133734