Loyalty (Noun)= allegiance; faithfulness; fidelity; obedience.
Treachery (Noun) = betrayal of trust; betrayal; disloyalty; infidelity back–stabbing; faithlessness. Look at the sentences : Any threat to this peace must be treated as an act of treachery – a traitor’s action. My loyalties to my family come before anything else.

Correct Option: C

Loyalty (Noun)= allegiance; faithfulness; fidelity; obedience.
Treachery (Noun) = betrayal of trust; betrayal; disloyalty; infidelity back–stabbing; faithlessness. Look at the sentences : Any threat to this peace must be treated as an act of treachery – a traitor’s action. My loyalties to my family come before anything else.

Permanent (Adjective) = lasting or intended to last or remain unchanged indefinitely; perpetual.
Interim (Adjective) = the intervening time; interval; interlude; intended to last for only a short time until something more permanent is found; provisional Look at the sentences : The vice–president took power in the interim period before the election. There is a permanent ban on the dumping of radioactive waste at sea.

Correct Option: C

Permanent (Adjective) = lasting or intended to last or remain unchanged indefinitely; perpetual.
Interim (Adjective) = the intervening time; interval; interlude; intended to last for only a short time until something more permanent is found; provisional Look at the sentences : The vice–president took power in the interim period before the election. There is a permanent ban on the dumping of radioactive waste at sea.

Fruitful (Adjective) = producing many useful results; productive.
Futile (Adjective) = having no purpose because there is no chance of success; pointless. Look at the sentence : Their efforts to revive him were futile. His continuous efforts were proved fruitful as he got a good job.

Correct Option: D

Fruitful (Adjective) = producing many useful results; productive.
Futile (Adjective) = having no purpose because there is no chance of success; pointless. Look at the sentence : Their efforts to revive him were futile. His continuous efforts were proved fruitful as he got a good job.

Unreflective (Adjective) = absent; minded; casual; cursory.
Contemplative (Adjective) = expressing or involving prolonged thought; thoughtful; pensive; reflective. Look at the sentence : She regarded me with a contemplative eye. After an unreflective look she moved on.

Correct Option: B

Unreflective (Adjective) = absent; minded; casual; cursory.
Contemplative (Adjective) = expressing or involving prolonged thought; thoughtful; pensive; reflective. Look at the sentence : She regarded me with a contemplative eye. After an unreflective look she moved on.

Worthless (Adjective) = having no real value or use; good for nothing.
Invaluable (Adjective) = extremely useful; indispensable; of inestimable worth; priceless. Look at the sentences : Mr. Crump says the help he has received from Macmillan nurses is invaluable. Joan had been deserted by a worthless husband.

Correct Option: D

Worthless (Adjective) = having no real value or use; good for nothing.
Invaluable (Adjective) = extremely useful; indispensable; of inestimable worth; priceless. Look at the sentences : Mr. Crump says the help he has received from Macmillan nurses is invaluable. Joan had been deserted by a worthless husband.