`101. ` familiarize 
`102`.nationwide 
`103.` celebrating
`104` destroyed
`105.`  activists 
`106.`non-existent
`107`.unidentified 
`108`.irreplaceable 
`109` expectancy 
`110`. enhance 
`111`. decorative

`112`.  acquaintance. 
`113`.  gifts
`114.`  volcanic 
`115.`  misbehave 

101. You should familiarize yourself with the new environment. (family)
102. We think that Mother’s Day should be celebrated nationwide (nation)
103. We are very busy celebrating the Lunar New Year holiday. (celebration)
104. I worry about the destroyed effect that violent films may have on children. (destroy)
105. He’s been one of the most effective activists in the campaign. (act)
106. My opinion is that ghosts are non-existent. There are no ghosts in the world. (exist)
107. What is the UFO, Dad ? – Well, it is an unidentified flying object. (identical)
108. Maldini is irreplaceable in AC Milan. He is the key to success. (replace)
109. Life expectancy has increased a lot in modern life. (expect)
110. Children will have a time to enhance tradition. (enhancement)
111. She is going downtown to buy some decorative ornaments. (decoration)
112. He is just a business acquaintance. (acquaint)
113. All guests arrived bringing gifts. (give)
114. These hills were formed by volcanic eruption. (volcano)
115. Students have a tendency to misbehave themselves at exam time. (behavior)