Scientists are convinced___the positive effect of laughter___physical and mental health.()
— Tom was late for class this morning again. — You know, _____.
For most people, life in __ Britain is very different to that lived by their grandparents.
It _____ to be a fine day the day before yesterday.
Have you decided ______ the color of your new car?
The operator put him ______ to 83428091.