Anglia provides a variety of exercises as well as explanations of grammar structures. You can check them by clicking on http://anglianetwork.eu/practice/grammar-points/ or do the suggested on-line exercises that are listed below.
Chapter 1: BEST FRIENDS
The first chapter includes the following grammar points: ADVERBS, INTERROGATIVE WORDS and TAG QUESTIONS. By clicking on the given links, you can practice English grammar from the comfort of your home.