They considered a computer, which was considered a great help in their work.
You’d better______smoking. It’s bad for your health.
----How do you like this book? ----I think it has nothing to______with our study.
----Where is Mr Brown? I have some questions to ask him. ----He ______the office.
The bus kept the people ______for twenty minutes.
I believe the scientists will______a better way to heal the disease.