—How can I make full use of my time? —Make          a clear timetable first．

This backpack must belong to _______.

— Alice, is this your pen? I need one to write down the name of the book. — No, it isn’t .  ________ is over there on the desk.

This is not my book. It is         .

------I am not going swimming tomorrow afternoon.------___________. I have to clean up my bedroom.