16.
Choose the word that is a necessary part of the underlined word.
bonus

17.
Choose the word that is a necessary part of the underlined word.
antique

18.
Choose the word that is a necessary part of the underlined word.
culture

19.
Choose the word that is a necessary part of the underlined word.
knowledge

20.
Choose the word that is a necessary part of the underlined word.
domicile