=>

1. Because Nathan missed the bus, he was late for school.

-> because S V: bởi vì

2. Keep the food covered or the flies will contaminate it.

-> or: hoặc, nếu không

3. Julie has a guitar and she plays it very well.

-> and: và

4. I need to study hard, so I can get a good score on the test.

-> so: vì vậy, vây nên

5. Although he seemed a friendly person, I didn't like him.

-> although S V: mặc dù

6. The food looks delicious, but it tastes horrible.

-> but: nhưng

7. Mason fell because the floor was wet.

-> because S V: bởi vì

8. Anna needed some money, so she took a part-time job.

-> so: vì vậy, vậy nên