Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food produced in the normal companies is____better.
I was ________ at the letter, which was _________ to my classmates..
---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.