Practice Future perfect simple here:

http://www.really-learn-english.com/future-perfect-exercises.html

Practice future continuous here:

http://www.ego4u.com/en/cram-up/grammar/future-1-progressive/exercises
http://www.perfect-english-grammar.com/future-continuous-exercise-3.html

Practice both tenses here:

http://www.ecenglish.com/learnenglish/lessons/future-continuous-and-future-perfect
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5110.php