2. Open the brackers
1. This design (to be completed) next month.
2. Iron (to be) the most useful metal.
3. They already (to install) the equipment
4. We (to replace) the parts of the machine
yesterday
5. When he came already (to make) a report for the conference,​

Ответ:

1. This design will be completed next month-future simple, passive voice

2. Iron is the most useful metal-present simple  

3. They have already installed the equipment-present perfect  

4. We replaced the parts of machine yesterday-past simple  

5. When he came has already made a report for the conference-present perfect