It is generally believed that teaching is ___________it is a science. 

Neither the museum nor the library ____ attractive to her.

You can't wear a blue jacket _____ that shirt — it'll look terrible. 

–There is _______ on using mobile phones at the gas station. --Do you mean talking on the mobile phone ________ at the gas station?

Jackson who was famous for his high energy performances _________ during the Democratic National Committee benefit concert, A Night at the Apollo once.