Поставьте предложения в отрицательную и вопросительную форму:
1.Our chief engineer spends much time on the sity.
2.It took much time to cross the Atlantic in the 19th centure.
3.The students of our department attend their lectures mostly in the morning.
4.The investors will furnish our laboratory with up-to-date equipment.
5.The scientist obtained similar results in all the experiments