Insert " to be able to" in the gaps. 1. I .... to do these test, because i work hard. 2.Nigar ..... to understand the words of this song as she kn

Insert " to be able to" in the gaps. 1. I .... to do these test, because i work hard. 2.Nigar ..... to understand the words of this song as she knows many English words. 3. My brother has many qualities and he.... to use modern computers. 4. They know four foreign languages and they ..... to travel many countries. 5. Students ...... to integrate the world education system.