It is difficult to devise ------- against computer hacking.
Speech consists not merely of sounds but ------- that follow various structural patterns.
Let me live unseen, unknown, and -------- .
Neither professor Johnson nor any other faculty member ------- to apply for the dean's position. (Choose the word or phrase or clause that best completes the sentence)
(Proponents) of no-fault divorce argue that when a marriage falls, it is more often the result of mistakes by both partners. (Choose the right meaning of the brackets word)