No more excuses!
If you feel you need more practise and revision, here you have a list of links that may help you. Besides, you have a general revision link on the side, where you can choose what you’d like to work on.
Modal verbs:
http://www.ego4u.com/en/cram-up/grammar/auxiliary-verbs/exercises
http://www.englishpage.com/modals/modalintro.html
http://www.wordpower.ws/grammar/gramex10.html
Passive voice
http://www.ego4u.com/en/cram-up/grammar/passive#exercises
http://www.smic.be/smic5022/passive1.htm
http://www.englisch-hilfen.de/en/exercises_list/passiv.htm
Conditionals
http://www.englishpage.com/conditional/conditionalintro.html http://www.ego4u.com/en/cram-up/grammar/conditional-sentences
Reported Speech
http://www.ego4u.com/en/cram-up/grammar/reported-speech