It is estimated that there are several thousand languages and dialects spoken in the world today.
There was another man who seemed to have answers.
They found so much in common that they regretted not having met earlier.
You don’t mind my asking you two more questions, do you?
He couldn’t make himself heard because of the noise outside,
It doesn’t make any difference whether(if) the meeting is held today or tomorrow.
We suggest that a meeting (should) be held as soon as possible.
To our disappointment, he failed to keep his promise.
In your proposal you haven’t taken into consideration (account) the special needs of old people.