September 30 is the day_______which you must pay your bill.

ght there would be many students in the hall,but when I got in, I found ______

24.China is a_____country____the third world.

________ matters to do the job well —what you are or where you come from?—Neither. It depends on whether you put your heart into it.

______ are you looking for— The key to my bike.