Phrasal verbs and idioms are probably the hardest part of English grammar to learn. It is true to say that if you want to speak English like a native person, you must learn these two grammar points well.
So, what is a phrasal verb, well the simple definition is that a phrasal verb is made up of a verb and a preposition or adverb and together creates a meaning which is different from the original verb, thus you must learn them to understand their meaning.
I ran into my teacher at the movies last night. run + into = meet.
He ran away when he was 15. run + away = leave home
OK, try the exercise and see how you do.