I,
1. She said that she would hand in her assignment to the teacher the following day
2. The science teacher asked Nguyen how many planets there were in the Solar System
3. If I were you , I would recycle these plastic bags
4. Eating too much sugar lead to health problems
II,
1. English is an official language in Malaysia , India and other countries
2. I think many people will prefer to communicate by using social media in the future.