_________ of the population in this area __________ farmers.
A. Two thirds ,are       B. Two thirds, is   C. Two third, is

Helen is my friend. She is in ______ at Beijing No.11Middle School.

There are  _______students in my school.

__________ the tourists come from South Korea.

_____ of the teachers are women in our school.
A. Second thirds              B. Two threes             C. Two thirds

Over the years I have collected five ________ foreign stamps, ________ of them are from the USA.
A. hundred; two hundreds             B. hundred; two hundred
C. hundreds of; two hundred            D. hundreds; two hundreds

—Did you know that the earth is the home of        animals?

It may take _________ years to make such robots .        

There are about ______ people in this town．

_____ the people lost their lives in the accident.