1. I know her brother to be a full-fledged building worker.
2. I didn't expect tile profession of a civil engineer to attract many numbers of young men and women.
3. These engineers believe them to have used a proper material for repairing the road
4. We know stone structures to be the earliest types of human dwellings.
5. I expect him to understand your problem and help you solve it
6. They state the construction work of a 16-storeyed house to have been started too
7. The students watched the experienced engineer demonstrating the advantages of silica concrete.
8. They wanted the builders to improve the quality of building constructions.
9. A young man observed the bricklayer laying the bricks one on the top of the other putting mortar between them with a trowel.
ответ:thirteen 13
Объяснение: