Choose the correct answers A, B, C, or D to complete the following sentences

If you want to stay healthy, you should have a balanced diet and _________ regularly.
1. work out
2. take out
3. speak out
4. stand out
For a healthy diet, you should ____________ sugar and eat more vegetables.
1. take on
2. cut down on
3. go on
4. cut with
Many experts believe that good ___________ transport will solve traffic problems in big cities.
1. individual
2. private
3. public
4. national
People feel safe in this neighbourhood because ____________ are installed everywhere.
1. smart cities
2. smartphones
3. smart cars
4. smart sensors
People of different generations often come into ____________ with one another.
1. belief
2. conflict
3. agreement
4. support
My brother is a true ___________. He grew up with technology, and started using a computer at an early age.
1. curious boy
2. critical thinker
3. digital native
4. book lover