Some of the wheat is from Canada. What about_____ ? 

Good health is __________ most people take for granted--- until they lose it .

I’m moving to the countryside because the air there is much fresher than ________ in the city.

—Which of the three optional courses did you like best,Joe?—To tell you the truth, I didn’t like          of them.

Senior three students in our school spend their days rushing from one exam to ______.