В нижепреведенных пробелах вставьте правильный предлог:

1. The building profession attracts many numbers ... young men and women.
2. Builders
construct residential and industrial buildings, palaces ... culture, etc.
3. Hundreds ... dams,
reservoirs, pump stations have been erected our hydrotechnicians. 4. The tremendous
(огромный) scope ... construction ... the Soviet Union is proof ... our desire and plans ... peace.​

1. The building profession attracts many numbers of young men and women.
- In this sentence, the preposition "of" is used to show that the profession attracts a large quantity or multitude of young men and women.

2. Builders construct residential and industrial buildings, palaces of culture, etc.
- In this sentence, the preposition "of" is used to indicate the purpose or function of the palaces – they are intended for cultural activities.

3. Hundreds of dams, reservoirs, and pump stations have been erected by our hydrotechnicians.
- In this sentence, the preposition "by" shows who performed the action of erecting the dams, reservoirs, and pump stations – it was the hydrotechnicians.

4. The tremendous scope of construction in the Soviet Union is proof of our desire and plans for peace.
- In this sentence, the preposition "of" is used to indicate what the proof is about - it is about the desire and plans for peace.

Overall, prepositions help to establish relationships between different words or elements in a sentence. Choosing the correct preposition is important for conveying the intended meaning and making the sentence grammatically correct.