complete the following sentence.

the indicates an action that was completed before another action.

future
present perfect
future perfect
past perfect

where is the

answer: the first one climax ,the second   is plot

explanation:

apprenticeships are formal, paid, long-term training programs that provide valuable classroom instruction coupled with on-the-job training for skilled, high-paying jobs.

i think the answer would mist likely be an adjective clause, because unhappy is an adjective.