These teenagers don’t know much of the world yet; that’s why they are so easily _____.
Lily is popular among her classmates ______ she can be annoying at times.
We all consider ______ important that we should put theory into practice.
Just like fingerprints, each person’s DNA is ________unless he has a twin.
The boy felt quite happy because he was closer now to ______ an answer of his own.
Taking charge of the big company, I’m afraid, is _____ his ability.