is the price of the dictionary?

Who is your favourite writer?—Mo Yan. He is the person won the 2012 Noble Prize in Literature. We are proud of him.

Where is Betty? —She is _____ China _____ her parents. [ ]

________of the chemical factories in their city _________pouring waste water into the river. It’s too dangerous.

There are ________ of students in our school, but only ______ are girls.