As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work.
When we heard the funny story, we ___.
I’d like to ___ my high school days, which were among the happiest in my life.
What ___ the book I put here yesterday?
I was too careless. If only I ___ my car!
He was disappointed that his plan did not ___.