She was a smart girl; I probably wasn't kidding her a bit.

That being the case, I'm going to be a smart girl and say good night.

According to Matt's grandfather, she seems like a smart girl.

She is the smartest girl in the academy and always makes A's.

"Even if you are the smartest girl in the school."

"For a smart girl you do some really stupid things."

I think sometimes really smart girls dumb themselves down a bit, and that's bad.

Rather, he wanted to marry the smartest girl in the class.

I think she wasn't a very smart little girl.

She's a smart little girl, though this guarantees nothing, of course.