Answer:
sphinx-like smile means a mysterious smile
The answer is c for this question
Answer: It probably depends on what you do as a job, but I'd say it's probably fine. It allows for a little bit more unpredictibility which is good in a lot of situations.
Explanation:
Answer:
If he studies he wont get paid anything but if he babysits he will earn 15 dollars so the opportunity to study will cost him $15
Explanation: