1. National Spanish exam : so it's "national " , it obviously has a good quality and quantity. You should take it as your practice test source.
2.http://www.spanish-test.net/
3 . Cambridge spanish test
Cambridge has three different types : German, Spanish and English. This test will includes 60 multiple-choice questions. There is no time limit (yay)
So it's just several dources for you to practice in addition to your exercises book! Hope you'll find it useful.