Iv. раскройте скобки, употребив одну из неличных форм глагола.
1. you must use a power-driven machine(чтобы выполнить) different operations with metal.
2. the investigation (проводимое) by the engineer is very important.
3. the test (выполненный) is very complex.
4. (проведя) experiment switch off the equipment.
5. (проводя) experiments be careful.
1. You must use a power-driven machine to perform different operations with metal.
2. The investigation performed by the engineer is very important.
3. The test performed is very complex.
4. Having performed experiment switch off the equipment.
5. When performing experiments be careful.
1. To perform
2. Performed
3. Performed
4. Performed
5. When performing
Объяснение: