Fill in the blanks with the words in the box.strikingpermanentcontroversialformative1. The treatment is ____________ because it may have serious side-effects.2. Perhaps the most ________ aspect of this computer is that it is so easy to use.3. Parents and our educational institutions play a vital role during the _________ years of the young.4. Children with severe and __________ learning difficulties should have the right to attend school, too.