Here you have some links to practice infinitives and gerunds:

http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?21

http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?04

http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?07

http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund/exercises?06

http://www.english-grammar-lessons.com/ingform/exercise4.swf

http://www.esoeonline.org/main-index/index-exercises/grammarexs/elem/elemverbs.htm 

http://a4esl.org/q/f/z/zz97mkm.htm

http://ww2.college-em.qc.ca/prof/epritchard/infgerun.htm

http://ww2.college-em.qc.ca/prof/epritchard/infgeru2.htm

http://www.perfect-english-grammar.com/gerunds-and-infinitives-exercise-1.html