1. c, this is because only a light is used when it is dark
2. f, this is because only the sun causes tans
3. b, this is because when you are late, you speed/hurry up
4. g, this is because you would keep a book you need to finish
5. b, this is because you need to woken up only if you are asleep
6. j, this is because only smoke makes you cough
7. c, this is because money is used to buy things
