D. Fill in the blank with the correct tense of the verb at the left.

(finish) 16. The boys _____ the lantern before they decorated the Christmas tree. Past perfect)

(arrive) 17. In a few minutes, my balikbayan aunt _____ (Future perfect)

(bring) 18. Modern machines like computers _____ ease and comfort to mankind. (Present perfect)

(donate)19. The generous lady _____ the new set of encyclopedias to the school. (Present perfect)

(fall) 20. Those yellow santol _____ from the tree by next Tuesday. (Future perfect)​