He is a man of few words, and seldom speaks until _____ to.
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 ______.
Beckham insisted the famous-brand car ____ to be sold out in order to pay back the debt.
----Do you have a doctor, Shylock, ______ Antonio's blood? ----That is not ______ the agreement.