Which is the correct passive form of the sentence: "Had they completed the project before the deadline?"

Here are the answers to the questions: 14. From the options A to D, the correct reported speech for the sentence in Question 14 below is: "I will keep my word," promised Kende. When converting direct speech to reported speech, the tense shifts. "Will keep" becomes "would keep" and the reporting verb "promised" is in the past tense. The correct option is B. Kende promised to keep her word*. 15. From the options A to D, the correct passive form of the sentence in Question 15 below is: Had they completed the project before the deadline? ... the project been completed by them before the deadline? The original sentence is in the past perfect interrogative. The passive form for this structure is "Had + subject + been + past participle". The correct option is C. Had*. 16. Doctors warn that smoking is injurious to our health. "Injurious" means causing or likely to cause damage or harm. The closest meaning is "harmful". The correct option is B. harmful*. 17. The entire community felt sad for losing such a benevolent person. "Benevolent" means well meaning and kindly. The closest meaning is "kind". The correct option is C. kind*. 19. A domineering person wants to have his way at all times. "Domineering" means asserting one's will over another in an arrogant way. The closest meaning is "overbearing". The correct option is B. overbearing*. 20. The minister pledged to establish a technical school in town. "Pledged" means made a solemn promise or commitment. The closest meaning is "promised". The correct option is D. promised*. 21. The hotel is only a stone's throw from the beach. This means that the hotel is The idiom "a stone's throw" means a very short distance. The correct option is A. very close to the beach*. 22. The warring factions have decided to bury the hatchet. This means that the factions have decided to The idiom "bury the hatchet" means to end a quarrel or conflict and become friendly. The correct option is D. reconcile*. 23. The beautiful lady looks down her nose at every young man who proposes to her. This means that she --- the young men. The idiom "looks down her nose at" means to regard with disdain or superiority. The correct option is B. despises*.