IV. Complete the sentences with the correct form of the verbs.
1. Three years ago, we____________(install) a solar water heating system on our roof
2. If the electricity________________(make)from wind turbines, it is green.
3. You should avoid _______________(use) cars or motorbikes for short trips.
4. At the same time tomorrow we ___________ (walk) through the streets of London.
5. London ___________ (be) one of the most populated cities of the world.
6. No one ___________ (want) to be homeless-it's dangerous and stressful
7. So far, Ha Tinh city ___________ (change) a lot.
8. We ___________ (not take) a trip to Ha Long bay due to Covid-19 pandemic yet.