________? I hope it was not serious.

They have built another new library for the students—About_____ of the books in their library are written in English．

We are going to play basketball _____ Sunday.[ ]

_______ is the Yellow River,5,300 kilometers or 6,300 kilometers?—5,300 kilometers, I think .[ ]

This is your pencil. ________ is over there, on the desk.