Решите пожелуйста  

Решите пожелуйста

Ответ:

1.many engeers don't learn....

do many engeers......?

2.our manager didn't stay....

 did our manager stay....?

3.voronin didn't go....

did voronin go....?

4.our firm doesn't sell...

does our firm sell...?

Источник: https://znanija.com/task/244052