Knowledge is to one’s mind ______ food is to one’s body.
You've failed to do what you _____ to and I'm afraid the teacher will blame you.
______ writing the article, Mrs. Curie even forgot her dinner.
---It seems that you are familiar with this city. ---I _____ English in a high school here for three years. It’s grerat to be back!
The news shocked the public, _______to great concern about students’ safety at school.
I’ve tried very hard to improve my English. But by no means ____with my progress.