Ernest visited the South Pole because he wanted to see one of the _______regions in the world.
---So you made it? ---Yes. It was so dark that we managed to avoid ________.
Chengdu has _______traffic that all the schools in it had a day off on the first day of the Western China International Economy and Trade Fair (西博会)to avoid traffic jams.
To her joy, Della earned first the trust of her students and then _______of her colleagues.
If we _______ now to protect the environment, we'll live to regret it.
My mother was over the age limit and ________, her application for the job was refused.