Little Mary says good night to her parents ________ she goes to bed every day.( )
A.ifB.untilC.beforeD.unless
(2014)—Do you know_______ in America? —Sure. It’s the third Sunday of June.
If you can not find the place, I will show you _______.
If you watch carefully, you can see ________ the man does the trick with the cards.
— Excuse me, can I interview Mr White? — A moment, please. Let me check ________.
The students don’t know the broken computer.