Всем привет помогите с заданием

Ответ:

1. Has Pavel worked at the factory for 12 years? - No, he hasn't.

2. Have our engineers improved this new method of work? - No, they haven't.

3. Had they completed their work by 5 o'clock yesterday? - No, they hadn't.

4. Has this plant developed new types of vehicles such as electromobiles, cars with magnetic suspension and so on? - No, it hasn't.

5. Has my friend dreamed of becoming a technical engineer for years? - No, he hasn't.