Insert "to be able to" in the gaps.Pay attention to the conjunctions. 1)I ... to do these tests,because I work hard.

1) I am able to do these tests, because I work hard.

 2) Nigar is able to understand the words of this song as she knows many English words.

 3) My brother has many genialities and he is able to use modern computers.

 4) They know four foreign languages and they are able to travel many countries.

5) Students are able to integrate the world education system.