Вопрос по английскому языку:

Прочитайте и переведите предложения, выберите правильную временную форму глагола.
6. Had the builders completed the foundation by the time the construction manager (arrives/ arrived/ arriving)? 7. The new method (increased/ will increase/ is increasing) productivity by 15% last month. 8. The welder (will finish/ will have finished/ finished) the work by Monday. 9. The supplier (delivers/ will deliver/has delivered) the building materials we’ve ordered next week. 10. Manufacturers will always try to reduce energy consumption, (will/ won’t / not) they?