Раскройте скобки, употребив глагол в нужном времени (Indefenit,Continuous,Active,Passive). 
1. Look!How many birds (to fly) high up in the air!
2. Yesterday he (to tell) us for two hours about his trip to India.
3. I (to watch) TV, when somebody (to knock) at the door.
4. These goods (to export) to all European countries.