Найдите и исправьте ошибки во временных формах глаголов, обратите особое внимание на построение вопросительных и отрицательных предложений. переведите исправленное предложение. 6. why this material become brittle? 7. poor quality materials was the reason for product defects. 8. will the worker replaced the faulty part of the machine? 9. in the early period of the industrial revolution, one large steam engine has given the power to drive all the machines in a factory. 10. the chief engineer will be discuss the new designs with the production department at 2 p.m. tomorrow.