INFINITIVE OR GERUND

Complete the sentences with the missing word: either the gerund or the infinitive (with or without "to")

John loves since he was a little child. (dance)
things takes a long time. (invent)
He decided me right then. (help)
His house is difficult . (find)
He studied hard his exams. (pass)
I learnt when I was 20. (drive)
He is used to his homework right after lunch. (do)
He used to his homework right after lunch, but now he doesn't. (do)
My parents enjoy for a walk every afternoon. (go)
poor people is the most important thing in his life. (help)
Before , just think! (write)
He wanted in his favourite team. (play)
He's very interested in concert tickets. (collect)