EX1: give the corect form of the verbs in brackets.
1. Your elder brother ( stay )..................... at home last night?
2. The weather ( become )................... colder and colder in December.
3. Thuy ( live )................... in Ho Chi Minh for to years.
4. The children are interested in ( read )................. folk tales, aren't they?
5. He ( build )............... his house since 2009.
6. Where you (go )........................... tomorrow?