a speaking acquaintance的用法和样例：
- The friend is inattentive , he doesn't help to change him, but spat at him and reviles him , he doesn't stack up to a speaking acquaintance.
- He went on a speaking tour of the United States.
- He went on a speaking tour of the United State.
- He is in the United States on a speaking tour.
- He go on a speaking tour of the United State.