11.When we got to _____ farmer’s house,he greeted us in_____ special way.
—I didn’t know this was a one-way street, officer.—________.
It seems that living green is __________ easy and affordable. A small step makes a big difference.
It was in the small house _____was built with stones by his father ____he spent his childhood.
__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.
I like this jacket better than that one, but it costs almost three times______.