—Could I speak to Miss Smith, please?—______. She’s gone to the post office.
If he is once ______ laughing, he finds ______ difficult to stop.
The hotel porter ______ anybody who wasn't wearing a collar and tie.
Nothing ______ stop us from ______ this plan.
_____ medicine works in a human body is a question ____ not everyone can understand fully.
----Any news about Bill Clinton? ----He left power three years ago and has a little now and a little then been ______.