When Madam Cuirie did the science experiement again, she was more careful where she _____ a mistake

I am _____ about what I say because careless remarks are likely to hurt others’ feelings．

This doubt had been in my mind for some time, but the research still went on _____some reasons.[ ]

We should consider the students’ request the school library provide more books on popular science.[ ]

What will happen if a driver gets annoyed in a traffic jam—Many drivers are _____ and they will push into other lanes of traffic or pass other cars.