用方框中所给单词的适当形式填空, 每词仅用一次(每空一词)。

Nowadays, working as a tutor in the free time is more and more for a college student. But what is a tutor?A tutor is a private teacher who a certain student or a small group of students. So if you are good at some , why not work as a tutor?It's a win­win thing because you make full of your time and make money at the same time. All you need to do is to make a proper ad of your service by using college newspapers and tools to spread your information.