определите в каждом из них видовременную форму и залог глагола-сказуемого.

2 This airplane crosses the Atlantic in about 10 hours.
3 When our teacher came to the laboratory, we were carrying out an experiment with a new device.
4 The delegation is headed by the Prime Minister.

Спасибо Большое!

Рада помочь)

2 crosses -Present Simple Activem3 came -Past Simple Acrive ;were carrying -Past Continuous Active4 is headed -Present Simple Passive