Scientists are convinced ___ the positive effect of laughter ____ physical and mental health.
---I’d like to invite you to dinner this Sunday, Mr. Smith. ---_____.
While reading, you can make a mark _____ you have a question.
In view of lacking preparations for the competition and not wanting to lose face, Johnson eventually decided to _____.
Shylock, how can you hope for mercy yourself when you show _____.
The doctor couldn’t answer the question _____ the patient could survive that night.