billy: what's up? you look pretty wound up.
michael: it's nothing, just this whole getting into college thing.
billy: what do you still have left to do?
michael: i still have to take a college entrance exam.
billy: i can see why you are all worked up. but don't worry, they're not too bad.
michael: who knows, maybe you are right? but i am still going home to study.
billy: alright, i'll catch you later.
new words 新单词
1) who knows （谁知道）：i don't know
who knows what i'll be doing next year.