Перевести на русский язык и подчеркнуть в каждом из них глагол -сказуемое и определить его видо-временную форму залога. 1. Wheat, rice, oats and rye are sown by tractor-drawn drills. 2. Dozens of tfe inventions have lightened the labors of farmers, 3, The tractor was being perfected and made adaptable to more kinds of work. 4.Mechanical energy and ingenuity have been applied to scores of other farm tasks. 5. The answers are depending upon many factors now.